Queen Mansion is just what it sounds like, a hive body that allows you to raise 3 queens at one time, or keep three queens in one deep hive body. We use them in our queen rearing operation and they work nicely. There are three separate areas in one deep hive body. Each section is completely sealed from the others so each queen has her very own three frame section with separate entrance. Three top pieces made for 3/4" pine serve as the individual top pieces so you can remove one at a time to work one section while the other two remain closed. This is a great flexible unit, because once you no longer want to hold queens, simply slide out the dividers and use it as a regular deep hive body and a regular screen bottom board. 9 Frames included. The bottom board has extra support under the screen to ensure a complete seal per section. Top cover not included.