Arras was founded on the hill of Baudimont by the Celtic tribe of the Atrebates, who named it Nemetacum or Nemetocena in reference to a nemeton (sacred grove) that probably existed there. It was later renamed Atrebatum by the Romans, under whom it became an important garrison town. The archaeological site Nemetacum in Arras is one of the rare sanctuaries devoted to the oriental god Attis in France.
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.