Connetable — obelisk and square in Gatchina, placed on the cross of 25 October prospect and Krasnoarmeysky prospect. Probably the author of the project was Vincenzo Brenna.
Wikipedia https://en.wikipedia.org/wiki/Connetable_(Gatchina)
Address Красноармейский проспект, Гатчина 188309, Russia
Coordinates 59°33'36.338" N 30°6'47.186" E
