The Oldřich Oak, also known as the Prince Oldřich Oak, is a Pedunculate Oak (Quercus robur) tree located in the market town of Peruc. It is estimated to be about 1,000 years old. The tree has a height of 30 m and a trunk circumference of 810 cm.
The tree derives its name from a legend, set in the 11th century, involving Oldřich of Bohemia and Božena, the mother of his only son. According to the legend, Oldřich set out on a hunt and travelled to Peruc. There, he spied a beautiful peasant girl, Božena, by a well (known today as Božena's spring) and was immediately entranced by her. Oldřich abandoned his hunt and took Božena back to Prague, and she eventually gave birth to his son Bretislaus. In the legend, Oldřich's first meeting with Božena took place in sight of the Oldřich Oak.
The Oldřich Oak is mentioned in the Chronicle of Dalimil.
References:House of the Blackheads (Melngalvju nams) is a building situated in the old town of Riga. The original building was erected during the first third of the 14th century for the Brotherhood of Blackheads, a guild for unmarried German merchants in Riga. Major works were done in the years 1580 and 1886, adding most of the ornaments.
The structure was bombed to a ruin by the Germans June 28, 1941 and the remains demolished by the Soviets in 1948. The current reconstruction was erected from 1995 to 1999. Today the House of Blackheads serves as a museum and sometimes concert hall.