The colonnade of St. Isaac's Cathedral is located at a height of 43 meters. To climb it, you need to overcome 2 spiral staircases of 200 steps. The colonnade consists of 24 columns, 14 meters long, and is an observation deck with a circular view.
When visiting the museum, personal protective equipment (masks and gloves) are provided. Visitors without personal protective equipment are not allowed at the exposition of the museum complex.