Doctor of Historical Sciences, Professor Kuznetsov, in the book *"The Stroganov Palace,"* suggested that besides the alchemical laboratory, a Masonic lodge gathered in this study. There was a Masonic sanctuary, and the Commission for the Construction of the Kazan Cathedral held its meetings there.

The meetings of the Freemasons took place in the "Rotunda" pavilion (the pavilion under the flag), one of the buildings of the Yelagin Palace complex. In the pavilion, during the visit of the famous magician and sorcerer Count Cagliostro, a ritual of initiation into the Egyptian-style Masonic lodge was held.

The meetings of the Freemasons took place in the "Rotunda" pavilion (the pavilion under the flag), one of the buildings of the Yelagin Palace complex. In the pavilion, during the visit of the famous magician and sorcerer Count Cagliostro, a ritual of initiation into the Egyptian-style Masonic lodge was held.

In the mansion of Elagin on Bolshaya Morskaya, the Masonic "Lodge of the Muses" was originally held, in which Ivan Perfilievich was listed as the "master of the chair" (magister).

The Eagle Pavilion (or the Temple, from *temple* — temple), also known as the Round Gazebo, but later the commonly used name became the Eagle Pavilion, is considered a kind of sanctuary dedicated to the emperor. It is possible that the interpretation of this structure as a temple was due to the fact that Paul I was the Grand Master of the Maltese Order, or the pavilion was originally conceived as a temple of the arts under the patronage of the emperor, but its decoration was never completed. The author of the pavilion project was presumably Vincenzo Brenna. The date of the pavilion’s construction is unknown; it is first mentioned in 1792 as an already existing structure.