St. Isaac's Cathedral

The cathedral was designed by the French architect Auguste de Montferrand in the middle of the 19th century. It took Auguste Montferrand 40 years to build it. The construction was started in 1818 and completed in 1858. St. Isaac’s is the fourth tallest 1 cupola cathedral in Europe. Its height is 101,5 metres/325 feet. It took 100 kg/220 lbs of gold to cover the dome.

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