This series of photos shows some of the modules used in my Modular Lego Castle System. I first try to show the modules and then show how it is used with the other modules. These are the same modules that I demonstrated at Brickcon and are part of my Lego Ideas Project called “Kingdoms Modular Castle” You can now vote for this to become a Lego set at this link This system is called the Kingdoms Modular Castle Creator system. You can vote for it to become a set on Lego Ideas https://ideas.lego.com/projects/14879
About this creation
In this photo we have three bottom room modules. These room modules are typically used to make the bottom level of the castle wall. These modules include a decorative buttress to give a strong sturdy look to the bottom level of the castle. In the center of the photo is a corner module designed to be used at the ends of the walls or to form the corners of an enclosed fortress. It is flanked on each side by what I call a bottom side module. These are typically used to make up the majority of the lower castle wall.
Here the three bottom modules are connected by Lego technic pins. Each module has a pair of Lego Technic pin holes on each of the four sides of the top of the module. The side modules come in several different variations, one wall, two adjacent walls, two adjacent walls and three walls to form a room.
Here is a view of the same 3 bottom room modules from the back. Here you can see the ample play space created by the large arches.
Here we have 2 top room modules shown next to each other. Each room module has a set of Lego Technic pin holes on each side. Lego Technic pins are used to hold modules together as well as to hang other modules of the sides of the room modules
These room modules can be connected by the Technic pins to create walls or a series of rooms. There are several different versions of the room modules available. One wall, two walls opposite, two walls adjacent, and three walls. There is also a version with no walls that consists of four open archways and the connection surface on the top of the module.
The room modules can also be stacked on top of each other. The top of each room module has four round 1x1 round tiles, one on each corner. The bottom of the modules has a space for in each corner to fit over the flat tiles holding the module from sliding off. The top of the module also has four exposed studs so that other modules can click in on top of the module
In this view we have 3 room module stacked in a pyramid. This shows how the modules can be offset by half a module when stacked. instead of only being stacked vertically. This feature significantly increases the variability of what you can do. This front view of the rooms shows you how these modules can be used to made a wall and or a tower.
In this view we have 3 room module stacked in a pyramid. This shows how the modules can be offset by half a module when stacked. instead of only being stacked vertically. This feature significantly increases the variability of what you can do. Notice the large archways on the back of each room module to allow kids to stage their minifigs inside.
The top surface of the room modules can hold either another room module or a battlement module. This picture shows two battlement modules that when combined and placed on top of the room module make a big play surface with space for several minifigs. The bottoms of the battlement modules click into the few exposed studs on the top of the room module.
Here the two battlement modules have been clicked into place on top of the room module. It seems that we have an open area on one end of the battlement. No worries, there’s a module for that.
This module is what I call a “Half Balcony”. This module hangs off of the room module by using the same technic pin holes that connect the room modules together.
Here the Half Balcony is clipped into the room module. It fits in quickly and easily. It has the same rounded 1x1 tiles that hold a module in place. The battlement also clicks into a few exposed stud on top of the room module.
This picture shows another battlement module with 3 sides sitting with the same two modules that were already placed on the top module in the previous photo.
Now all 3 modules are clipped into the top of the room module and the half balcony. The top of the room is no enclosed within battlements. A remember the modules can be quickly and easily removed by just pulling them off.
This shot shows the bottom of a top room module and a whole four sided battlement module. Note the four corners of the 8x8 bottom of the room module where the flat 1x1 tiles lock in to hold the room module in place. The battlement module has four 1x6 leaving the corners open to also lock into the four 1x1 flat tiles while providing the underside of a place to catch and hold the exposed studs that are also on the top side of the room module.
This piece is called a “Whole Balcony” it attaches to the side of the room modules by the Technic pin and hole system described above.
This balcony extends the surface out by a whole 8x8 module. This new surface has the same system of 1x1 flat round tiles and the corners with the exposed stud in between.
The two half or 4x8 battlement modules can now be placed on top of the whole balcony to again close in the surface with a large play area able to hold several minifigs.
Here is a top room module with a four sided whole 8x8 battlement module. This piece comes in handy for making a quick watchtower to defend.
The four sided battlement module has the four 1x6’s shown earlier which help it lock into place quickly and easily. It can also be removed quickly without pulling any of the plates or tiles off the module below it.
This black module is a roof module. It also has the four 1x6 plates around the perimeter of the 8x8 base leaving the corners open to fit up against the 1x1 round flat tiles on the corners of the module below. The underside of the 1x6 plates click into the 4 exposed studs that are located one per side on the top of the module below. You may be seeing a pattern by now of how these modules all fit together.
Next we have what I call a decorative half height module. As you can see it has the standard top that allows any other module to be placed on top of it. It can be used to increase the height of any tower in order to make it stand out or to make sure that the module you place on top of it has enough clearance as to not interfere with another module of the same height.
Here you can see the roof module placed on top of the decorative module. You can of course place the roof module directly on top of the room module but it looks better when the decorative module is used between the room and the roof modules.
In this picture you can see the decorative module placed on top of the room module. You can see at the corners these two modules fit together using the same connect method described in earlier pictures. You can put the roof module on top or you could even place a four sided whole 8x8 battlement module on top to make a secure watch tower with room for a few minifigs.
Now you can see all three modules stacked together. This makes a great tower when placed on top of one of the bottom or even one of the top room modules. You can keep stacking the modules until you top it off with a battlement or roof modules. No modules are designed to be placed on top of a roof or battlement module.
Here I have a 2 sided top room module that I call a hallway. Notice the large arches that allow little hands to reach in and place a minifig or even build a scene. In front of the hallway module are two of the half balcony modules.
Next I have attached the balcony modules, one on each side of the hallway module. This doubles the surface area of the available space for battlements or other room modules.
Here you can see that I have added two half battlement modules that close off the place space to provide protection to your knights and prevent them from falling from the top of an open wall. You may notice the space between the recently added battlement modules is just the right size to place a top room module to provide another level to the watch tower.
Now I have added a 2 sided top room or “Hallway” module. The open doorway arches line up with the additional play space that is created by adding the half balconies with the battlements on top.
Here a 4 sided battlement module has been placed on top of the uppermost room module. This creates a nice watch tower with battlement place space for minifigs on both sides and on the top. This entire tower can now be placed anywhere in the castle you are building where there is an open 8x8 area. It will again fit into place using the open four corners on the bottom fitting up against the four flat 1x1 round tiles on the corners on the top of the module where you wish to place it. Moving groups of modules is an even faster way to reconfigure your castle quickly.
This picture shows the tower from the previous picture being placed on top of what is called a bottom room module. Two additional half balconies covered by half battlements have been clicked into the Lego Technic pin holes on the top of the bottom room module to provide additional battlement place space for your minifigs. Had single sided top rooms been used the entire back side of the tower could be open for placing minifigs within the modules from the backside. The possibilities and combinations you can come up with are only limited by your imagination and the number of modules you have.
Here is the same tower with the roof and decorative module on top instead of the four sided whole battlement module. Keep in mind too that the Lego Technic pin holes that are not used in your current castle design can be filled with decorative items to both dress up the castle and hide the holes. For some examples of what you can do, refer to the set of photos called the “Brickcon Display Castle”. Here I have used flags, banners, shields, swords, plants and 1x1 tiles by attaching them to a Lego Technic half pin that clicks into the Technic pin holes.
Here is a close up of two whole 8x8 battlement modules. One has four sides and is designed to sit at the top of room or tower. This 4 sided battlement can take the place of two half 4x8 three sided battlement modules. Either would work at the top of a tower. The small modules give you more options as they could also be used to create a battlement play space on top of a balcony area. The module on the right has three sides and is designed to be used on the corner of a wall. The opens sides could be facing a room or a battlement area.
Both of these modules are considered two sided half 4x8 battlement modules. These can be used to extend a battlement area across the top of a wall or to connect an archway to a three sided battlement that is 4 studs or half a module away. The module on the left has the battlement set in by one stud. This is to provide clearance when two battlement modules come together at 90 degrees or a right angle. Since the battlement modules use inverse slopes to allow the battlements to hang out over the edge, they extend out of their footprint by one stud. This will cause an interference issue if two battlements come together in a corner. Use one of these adaptor modules on onside of the corner to make things fit.
While combining these modules in the many way that you will dream up, you may end up with one side of a battlement area needed to be closed up. These two modules are designed to solve those for those situations. The module on the left can also be used to create a walkway around the side of a room.
There may also be situations where you may need a flat wall section to fill a gap in a battlement where the battlement modules described above will not fit. These flat wall sections also come in handy to provide a back battlement on top of the gate module when a corner prevents you from using the other battlement modules. I have explored many many different module combinations and configurations with many hours of play testing and building. So far I have been able to design a module for each interference problem we have come across. Please let me know if you see a situation that I do not have a solution for and I will find one.
These two modules are designed to fit in an area where there is not room for a battlement module to encroach one stud into the space next to it. These modules are different in that they are self-contained and hang directly off of the room modules by the same Lego Technic pin and hole system. They do not require a balcony to be set on top of. The module on the left is called a curved battlement balcony and works well on the front of a castle or in a tight spot such as at a right angle or 90 degrees to another balcony and battlement combination. The one on the right is referred to as a decorative railing and is great for dressing up the top story of a tower to give it more of a living space look than a fighting space.
Here you can see the other side of these modules. There is space to place a minifigs looking out over the Kingdom. The floor of these modules lines up with the floor level with all of the other modules so that there is always an even and level floor with no height difference between the modules.
This strange looking module is what I call a half bridge. It is based on a 4x8 plate and has the same system of 1x1 round flat tiles and some exposed studs to help grip the module that gets placed on top of it. It has the same Lego Technic pin and hole system, but only on two sides. This module allows you to create a half module sized surface between room modules. You can use that space to help you offset the room modules so that they are half a module off being directly stacked on top of each other. This ability to offset the room modules by half a module significantly adds to the building options that are open to you using this system.
This next module is called a whole bridge and is based on the same 8x8 plate with the system of flat tiles and exposed studs on the top. So just like any room or balcony module, you can place any module on top of this bridge. It has the Lego Technic pin system on all four sides so that it can be connected to up to four other room or balcony modules at one time. Most often this is used to create battlement space between room modules or to create an open space in a wall or to suspend room modules seemingly in midair.
The simple gate module is one of the very few double or 8x16 modules. I have tried very hard to keep the modules all very small. Once the modules become too big they really are not modules any more and have more limitations on how they can be combined with the other modules. Since this is mostly going to be used as the front gate of the castle it seemed Ok to make it big enough to hold a set of doors that you can bring horses and carts through.
This is the back side of the simple gate module. The central archway in the back is also large enough to reach through to place minifigs in the gate area. I have also developed a complex gate module that sits directly on top of this module which has a working Portcullis and drawbridge that clips on to the front of the simple gate. You can see this complex Portcullis module in the set of photos that are labeled “Brickcon Display Castle”. In those pictures are a few other modules not shown here such as a longer battlement module that is 4x12 and allows you to create a continuous battlement around the base of a room module. This works well with the top room module with no wall. This combination is also visible in the “Brickcon Display Castle”
Lastly, is one simple example of a very small castle that can be built using this castle modular system. All of the modules are constructed out of standard Lego parts and take only a few minutes to build for each module. Using the already built modules this small castle was built in about one minute. Please notice that decorative flags are used to decorate the unused Lego Technic pin holes. You can find many more examples of castles built using this system both big and small here on MOC pages from my main page found at
or you can search by Kindgoms Modular Castle. If you are interested in seeing video demonstrations of how a few castles were built using this system. Please visit my YouTube channel at
This modular castle system has been submitted to Lego Ideas to become a set. If you like this system and would like to be able to buy it in the future, Please go to
or search for “Lego Ideas Kingdoms Modular Castle” and vote for this project to become a set. If you like this system, please tell your friends about it so they might also be able to enjoy using it in the future.
Hi, I just posted a video on YouTube today showing how my Modular Castle System works. You really need to see this to get just how flexible this system is. It will be worth your time. https://www.youtube.com/watch?v=6M6T5OBxByM
Thanks for the Like and encouragement.
Did you know that this system has been submitted to Lego Ideas to be a set?
I would really appreciate it if you could take a minute to vote for it. You can also find a few short videos on YouTube showing how the modules quickly go together to make different castles, Just search for "Modular Lego Castles" on YouTube. Thanks again!!
Quoting The Royal Brick
Fantastic work as usual, Michael! I would suggest adding this to some groups so that more people will see and enjoy it!
Thank you for the suggestion. I am new to this world and MOCpages. I think I may have just accidentally added all of them from this folder to a group. I don't want to be a hog and add too many at a time. Could you please suggest how many photos people usually add at one time? Thanks again for your encouragement.