The interior hall runs all along the colonnaded facade and presents a monumental decorated ceiling, as well as some of its original furniture.
Murals from the 1930s show downtown views.
embedded in the main pattern of the ceiling are national blasons of many countries that have contributed to the development of the postal service system.
The..Dutch, though the lions and motto of Orange-Nassau are also found on the Luxembourgish one.
The old plaster model is still on display, and there is a small postal history museum inside the building as well.