House of the Blackheads

House of the Blackheads at dusk House of the Blackheads in early 20th century Hypocaust or warm air furnace

The House of the Blackheads (Latvian: Melngalvju nams, German: Schwarzhäupterhaus) is a building situated in the old town of Riga, Latvia. The original building was erected in 1334 as a warehouse, meeting and celebration place for merchants. It was the biggest public building of Riga. From mid-15th century it was also used by Brotherhood of Blackheads, a guild for unmarried merchants, shipowners and foreigners in Riga. Major works were done in the early 17th century, adding most of the Mannerist ornamentation. In the 19th century some of the sculptures were made by the workshop of August Volz. Additionally, it is the site of the first decorated Christmas tree, which was erected in 1510.