Okay, so far the History Museum of the Socialist State has:
-Entrance hall, complete with the first Socialist Hammer and a MKI RSU Nuke (which is ofcourse disarmed)
This Hall has a set of old minifigures on display, with as crown jewel the "Statue of the Fallen Idol," which is rumoured to represent Diablo.
Currently the Socialist State Museum has two halls dedicated to fossils, with as crown jewels a restored Pterodactyl skeleton, and a Mammoth skeleton. The Party is doing everything in it's power to retrieve and restore a tyrannosaur.
-Hall of the Ark
Somewhere in 2013 archeologists made an astonishing discovery in Egypt, the original Ark of Covenant. The Museum made, with the help of said archeologists, an identical replica of the Ark itself, and the room it was found in. The genuine Ark is stored in a safe location to prevent theft.
-Hall of Landscapes
This hall has 8 landscapes on display made by famous artists from the 15/1600's.
-Hall of Old Art
This Hall features various daguerreotypes, portraying the daily lives of times long by. At the center of this hall is an old map of New Moscow on display, made by an unknown cartographer in 1362.
The Museum is still under heavy construction. It is estimated that the museum will grow atleast two times as big as it is now.