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Instituted in the early years following the Bolshevik Revolution, the gulag system of prison camps constitutes one of the darkest chapters of Soviet history.

Located on the Russian-Finnish border, Paanajärvi is the last intact village in the district of Viena Karelia along the Kemi River.

Russian chemist Dimitri Mendeleev is perhaps most celebrated for his development of the Mendeleev – or Periodic – Table, which categorized elements by their atomic weight.

Assumption Church is an elegant wooden structure with a distinctive nebo, or sky, a highly decorated painted ceiling made up of twenty panels surrounding the central tondo.

In the 18th century, Prince Nikolai Golitsyn commissioned French architects to craft an elaborate palace and grounds on the outskirts of Moscow.

The Romano Catholic Church of Saint Emeric was built in the thirteenth century by the first Christian settlers in present day Ghelinta.

The 4th-century Roman villa of Rabaçal is perhaps the most important ruin at the site of ancient Conimbriga, one of the largest Roman sites, and the best preserved, in Portugal.

The origins of Vistulamouth Fortress probably date to the early medieval period, when a lighthouse and watchtower guarding the mouth of the Vistula River occupied the site of the current structures.

The Old Lublin Theater was designed in the neo-classical style by its first owner, Polish architect Lukasz Rodakiewicz, to host local and traveling performances for the entertainment of local citizenry.

When industrial activity began in the forests north of Manila, loggers discovered ancient burial caves hewn out of the rock containing mummified remains and hundreds of coffins and skulls.

The chapel of San Pedro de Mórrope was constructed in the 16th century during the Colonial period in Peru in an effort to convert the indigenous Mochica people to Christianity.

When the Spanish conquistador Pizarro began his pillaging of Peru in 1533, he seized the Inca emperor Atahualpa and held him prisoner in what has come to be known as the Ransom Room.