The monument you are describing is dedicated to the fallen Guardsmen from the Third Guards Infantry Division and is a testament to the historical events during the Russian-Turkish War. It was initially constructed in 1885 and has undergone several restorations over the years, with the latest one in celebration of the 130th anniversary of the liberation of Sofia.
The monument serves as a commemoration of Lieutenant General Vasily Katalei and Major General Dmitry Filosofov, both of whom lost their lives in a battle with the Turkish army on January 2, 1878. The restoration efforts have aimed to preserve the original appearance of the monument, including features such as the double-headed eagle.
Monuments like these not only represent historical events but also serve as enduring symbols of the shared history between nations. The periodic restorations and maintenance efforts reflect the importance attached to preserving and honoring the memories of those who sacrificed their lives during significant moments in history.