Medieval castles were fortified structures that served as residences and military bases for lords and nobles during the Middle Ages. They were typically built on high ground, such as a hill or rocky outcropping, and were surrounded by walls and a moat to provide additional protection.

To build a medieval castle in Minecraft, you can follow these steps:

1. Choose a location: Find a suitable location for your castle, preferably on a hill or elevated terrain. You'll want to clear the area of trees and other obstructions before you start building.

2. Plan the layout: Decide on the shape and size of your castle. You can choose to build a square, rectangular, or circular castle. Plan out the walls, towers, gatehouse, and keep (the main building) using blocks or a blueprint.

3. Build the walls: Start building the outer walls of your castle. Use stone or cobblestone blocks to make the walls, and add crenellations and battlements at the top for a more authentic look. Make sure the walls are thick enough to provide adequate protection.

4. Add towers: Build towers at the corners of the walls and along the walls themselves. The towers should be taller than the walls and should have arrow slits or windows for archers to shoot from.

5. Create a gatehouse: Build a gatehouse at the entrance to your castle. It should be a separate building with a portcullis or drawbridge that can be raised and lowered. Add towers on either side of the gatehouse for additional protection.

6. Build the keep: The keep is the main building of your castle and should be located in the center. It should be taller than the walls and towers and have a flat roof with crenellations. You can add rooms inside the keep, such as a great hall, bedrooms, and a chapel.

7. Add details: To make your castle look more realistic, add details such as banners, flags, torches, and furniture. You can also add a moat around your castle, complete with water and a drawbridge.

8. Defend your castle: Your castle is now complete, but you'll need to defend it from enemies. Add traps, such as pressure plates that activate TNT, or use golems to guard the entrance. You can also recruit soldiers or knights to defend your castle from invaders.

With these steps, you can create a detailed and realistic medieval castle in Minecraft that will provide hours of fun and adventure.

The castle has no furniture.