The flag was woven by local nuns and given to the Bulgarian volunteers during the Russo-Turkish War of 1877–78 by inhabitants of the Russian city of Samara, on May 18th, 1877.
The flag, originally intended for the rebels of the April Uprising of 1876, was handed to the Bulgarians near Ploieşti on 18 May, having been transported through Chişinău, where it arrived on May 1st.
Known in history is the feat of lieutenant colonel Pavel Kalitin , who with heroic efforts and the cost of his life managed to save the flag from Turkish captivity.
The nuns of the Russian-founded Knyazhevo Nunnery of the Shroud of the Most Holy Mother of God created another precise replica in 2006.
The flag is a tricolor cloth (from top to bottom horizontally: red, white, blue) measuring 1.85 by 1.90 meters with gold crosses sewn in the middle.