St Sampson's Cathedral is one of the oldest churches in St. Petersburg. Rumor has it that it was in St. Sampson's Cathedral that Catherine II of Russia secretly married Grigory Potemkin in 1774.
The original wooden church was built in 1710 to honor Sampson the Hospitable. It was on the feast day of that saint that Peter the Great defeated Charles XII of Sweden in the Battle of Poltava. The existing church was built under Empress Anna to a design by Pietro Antonio Trezzini. It was consecrated in 1740. The tent-like belltower was built at a later date. The original church had only one dome; the four subsidiary domes were added in 1761.
The church was considerably renovated as part of the battle's bicentennial celebrations. A Rastrelliesque chapel was constructed on the grounds, and Peter I's address to his soldiers at Poltava was inscribed on the wall. It was at that time that the church was elevated to cathedral status. The parish was disbanded by the Soviets in the 1930s, and the building was converted into a warehouse. It was restored in the late 1970s and reopened in 2000 as a museum attached to St. Isaac's Cathedral.
The grave yard which surrounds the church has been filled for centuries. Some of the city's first foreign architects, including Jean-Baptiste Alexandre Le Blond and Domenico Trezzini, were buried there. The tomb of Artemy Volynsky and Pyotr Yeropkin (both executed exactly 31 years after the Poltava victory) is made by Alexander Opekushin (1885). The statue of Peter the Great in front of the cathedral was designed by Mark Antokolsky. It was removed by the Soviets and restored in 2003 as part of the city's tercentenary celebrations.
On 5th February 2017 the cathedral was transferred from the state to the Russian Orthodox Church at a ceremony in the cathedral.
Celje Castle was once the largest fortification on Slovenian territory. The first fortified building on the site (a Romanesque palace) was built in the first half of the 13th century by the Counts of Heunburg from Carinthia on the stony outcrop on the western side of the ridge where the castle stands. It had five sides, or four plus the southern side, which was a natural defence. The first written records of the castle date back to between 1125 and 1137; it was probably built by Count Gunter. In the western section of the castle, there was a building with several floors. Remains of the walls of this palatium have survived. In the eastern section, there was an enclosed courtyard with large water reservoirs. The eastern wall, which protects the castle from its most exposed side, was around three metres thicker than the rest of the curtain wall. The wall was topped with a parapet and protected walkway.