The Dominican monastery was founded in 1246 and it is the oldest one in the medieval old town. The center of monastery was St. Catherine's Church, which was completed in the late 1300s and was the largest church building in the lower town. The Monastery was expanded several times, most recently in the 16th century.
St. Catherine's convent closed down in 1525, when the monks were expelled from Tallinn during the Reformation. The looted and empty monastery church was destroyed by fire in 1531 - only ruins were left.
There were originally three inner chambers (together so-called claustrum) in the monastery allowed only for residents. The claustrum housed the most important rooms in the monastery: the prior’s room, the old library, the chapter hall, the dormitory, the sacristy, the cloister and the vestry. In the 14th and 15th centuries the leaders of the knight guilds of Harju and Virumaa often used the claustrum as their meeting and gathering place.
Only the eastern chamber has been preserved to our days. The dormitory, library, dining room and other rooms provide a fascinating opportunity to take a peek into the life of medieval monks. A mysterious "energy column" is located in the basement. According the legend it can be a source of physical and mental well-being.
References: VisitEstonia, ABC Matkatoimisto
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.