10 Leva Ivan Vazov National Theatre, Piedfort

Ivan Vazov National Theatre in Sofia was completed in 1907, though the original building burned to the ground in 1923 and the current neo-baroque structure was rebuilt and reopened in 1929. The piedfort format — struck at double the standard planchet thickness — has no circulation purpose; these are purely collector strikes, produced in small numbers and typically sold directly by issuing banks at a premium over face value.

KM#P4 places this firmly in the piedfort subset of Bulgarian commemorative coinage, a category the Bulgarian National Bank used selectively in the early 2000s.