The haunted building that I can present to you is the remains of the 13th century church of the Franciscan monastery "Das Graue Kloster" in Berlin:
According to legends, the ghost of the limping monk Roderich has been haunting the ruins of the monastery church since the 14th century, howling and wailing. Originally, Roderich had been a squire and had illegally freed a damsel. When he once again climbed a rope to the damsel in the tower, her father, the bailiff, a true giant, discovered this. Enraged, he tore off the rope and stormed up into the tower. Roderich fled out the window and broke his foot, which is why he limped from then on. Since he had dishonored the damsel, he had to flee and became a monk in the Grey Monastery in Berlin. There he became evil and devious, sowed discord everywhere and even instigated murder plots. What he did not know was that his relationship with the damsel had produced a child, his son Bernhard. When Bernhard had to leave his hometown one day, he also happened to come to the Grey Monastery. When he correctly accused Roderich of a murder plot, the latter made him disappear in a dungeon of the monastery. Some time later, Roderich learned that Bernhard was his son and rushed to the dungeon. But there he found him dead and thereupon fell into a wild lamentation. In the meantime, the citizens had also discovered Roderich's murder plot. They rushed to the monastery, heard him lament, found him in the cellar and killed him the next day. Since then, the lamentation of the limping monk, who weeps for his dead son, is said to be heard at night in the ruins of the monastery.
Best regards!