This is a plate by/for the “Haus des Deutschen Rechts” (House of the German law) for the “Grundsteinlegung” (laying of the foundation) on 24.X.36.
Ceramic glazed plate with a diameter of 18,5 centimeters, made by Nymphenburg.
It is on the back maker marked. Although these plates are typially rough looking there is no damage. Some period production spots, but overal just as good as possible and in my opinion impossible to upgrade.
Haus des Deutschen Rechts items are very very hard to find! Rare!