Monastery of St. Jacob Saviour (Spaso-Yakovlevsky) is an Eastern Orthodox monastery situated to the left from the Rostov kremlin on the Rostov's outskirts. Monastery was founded in the 14th century by St Iakov of Rostov.
The earliest kept building of a monastery is Cathedral of Conception of St Anna. It has been constructed in 1686. Another 17th-century building is Savior Transfiguration Cathedral which once belonged to the abolished Spaso-Pesotsky Monastery.
It has been greatly venerated as the shrine of St. Dmitry of Rostov. Most of the monastery structures were built in the late 18th and early 19th centuries in the fine neoclassical style. The Cathedral of St. Dmitry of Rostov has been constructed in 1794–1802 with support of Nikolai Sheremetev's column.
References:Carlsten is a stone fortress built on the orders of King Carl X of Sweden following the Treaty of Roskilde, 1658 to protect the newly acquired province of Bohuslän from hostile attacks. The site of Marstrand was chosen because of its location and its access to an ice free port. Initially a square stone tower was constructed, but by 1680 it was reconstructed and replaced by a round shaped tower. Successive additions to the fortress were carried out, by the inmates sentenced to hard labour, until 1860 when it was reported finished. The fortress was decommissioned as a permanent defense installation in 1882, but remained in military use until the early 1990s.
The fortress was attacked and sieged twice falling into enemy hands. In 1677 it was conquered by Ulrik Frederick Gyldenløve, the Danish military commander in Norway and in 1719 by the Norwegian Vice-Admiral Tordenskjold. At both occasions the fortress was returned to Swedish control through negotiations and treaties.