Wikipedia
Burgschule (Königsberg)
The Burgschule or Oberrealschule auf der Burg was a secondary school ( Oberrealschule) located originally in central Königsberg, Germany, and later in the suburban Amalienau quarter. It was the fourth oldest school in the city, behind Altstadt Gymnasium, Kneiphof Gymnasium, and Löbenicht Realgymnasium.