The Russian monument (as it is known today) was the first in Sofia and one of the first in the country, raised after the libereation of Bulgaria from the Turks. It was build on the very edge of the city. It was inaugurated by kniaz Aleksander Batemberg on the 29th of June 1882.
To see the same monument nowadays, please click the link --> http://www.pbase.com/ngruev/image/28452792