lightweight. St. Isaac's Cathedral represents the first use of this technique in architecture. The meticulous and painstakingly detailed work on constructing the St. Isaac's Cathedral took 40 years to complete. This extended construction left an expression in the Finnish language, ("to build like St. Isaac's Church"), for lengthy and never-ending megaprojects. Gallery See also Cathedral of Christ the Saviour (Moscow) List of tallest Orthodox churches List of large Orthodox cathedrals List of tallest domes References Notes Sources External links The Main Cathedral of the Russian Empire Official website of the State Monument Museum St Isaac's Cathedral St Isaac's Cathedral guide, a large photo collection St Isaac's Cathedral WebCam Cathedrals in Saint Petersburg Church buildings with domes Isaac History museums in Saint Petersburg Religious museums in Russia Cathedral, Saint Isaacand#39's Cathedral Churches completed in 1858 19th-century Eastern Orthodox church buildings Auguste de Montferrand buildings and structures Cultural heritage monuments of federal significance in Saint Petersburg Neoclassical church buildings in Russia