Demidovsky Pillar, Granite obelisk on Demidov Square, Barnaul, Russia

The Demidovsky Pillar is a 14-metre obelisk on Demidov Square in Barnaul, cut from 12 blocks of grey granite quarried in the Kolyvan region and floated down the Charysh and Ob rivers. The granite shaft stands on a high pedestal resting on four cast-iron supports; bronze plaques and a cast-iron oval bas-relief of Akinfiy Demidov were once fixed to its faces.

The first stone was laid on 18 June 1825 on the initiative of Pyotr Kozmitch Frolov, head of the Kolyvano-Voskresensk factory chancellery, to mark a century of mining in the Altai. Architect Jakob Nikolayevich Popov reduced the planned height from 21 to 14 metres during construction. The obelisk was completed in 1839.

The obelisk's base carries bronze plaques and once held a cast-iron oval bas-relief of Akinfiy Demidov, made at the Guryev plant and now kept in the Regional Museum as an example of artistic casting. The 1949 plaque names the monument to a century of mining in the Altai (1725–1825) and credits architect Yakov Popov.

The pillar stands on Demidov Square in Barnaul's Central District, on the axis of the former Kolyvano-Voskresensky plant complex. The 1949 plaques on the pedestal face the square and can be read at close range; the granite base is surrounded by open paving with no steps or railing. The site is outdoors and unstaffed, so it can be viewed at any hour.

In 1918, workers attempted to destroy the monument by pouring molten lead between the granite blocks to separate them, but the effort failed. The obelisk withstood this attack and remains intact today.