Alexander Column:

The Alexander Column is the focal point of Palace Square in Saint Petersburg, Russia. The monument was raised after the Russian victory in the war with Napoleon's France. The column is named for Emperor Alexander I of Russia.
The monument is claimed to be the tallest of its kind in the world at 47 m (155 ft) tall and is topped with a statue of an angel holding a cross. As a monolith that has been quarried, moved and erected it is the heaviest recorded. The face of the angel bears great similarity to the face of Emperor Alexander I.
The column is a single piece of red granite. The granite monolith was obtained from Virolahti, Finland and in 1832 transported by sea to Saint Petersburg, on a barge specially designed for this purpose, where it underwent further working. Without the aid of modern cranes and engineering machines, the column, weighing 600 tonnes was erected by 3,000 men in less than 2 hours. It is set so neatly that no attachment to the base is needed and it is fixed in position by its own weight alone.