The construction of Gerione Castle was probably motivated by the need to control mountain routes and its strategic position as an observation point for a large part of the Sele plain. Documented for the first time in a parchment from 1056 during the Lombard period, the exact date of its construction is unknown.
With the Assise of Capua in 1220, the Gerione Castle was acquired by Frederick II of Sweden for the Demanio Regio, becoming directly dependent on the emperor and included among the Castra exempta, the main fortifications of the kingdom.
The structure maintained its military-defensive function until 1515 when, due to its inconvenient location for the needs of the time, it was handed over to the Collegiate Church of Santa Maria della Pace by the last feudal lord to possess it, Duke Ferdinando Orsini. According to others, the castle was used both as a prison and as a Spanish garrison during the feudal rule of the Grimaldi Princes of Monaco, Marquises of Campagna.
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.