From Wikipedia:

"Napoleon erected the present column, modelled after Trajan's Column, to celebrate the victory of Austerlitz; its veneer of 425 spiraling bas-relief bronze plates were made out of cannon taken from the combined armies of Europe, according to his propaganda. (The usual figure given is hugely exaggerated: 133 cannon were actually captured at Austerlitz.) These plates were designed by the sculptor Pierre-Nolasque Bergeret and executed by a team of sculptors including Jean Joseph Foucou, Louis-Simon Boizot, François Joseph Bosio, Lorenzo Bartolini, Claude Ramey, Francois Rude, Corbet, Clodion and Henri-Joseph Ruxthiel."

It is located at Place Vendôme a square in the 1st arrondissement of Paris.