The oldest secular building in Moscow, built between 1487 and 1491 by Marco Ruffo and Pietro Antonio Solario. It gets its name from the diamond-shaped pattern on the exterior. The upper floor is a large hall, the largest in Moscow when it was built. It was mainly used for feasts and for receiving ambassadors. The Red Staircase from this hall was demolished in the 1930s, in connection with alterations to the Kremlin Great Palace.
It was almost completely demolished during the time of the Polish occupation..
