> Bulgarian national currency is BGN, and as of now, its value is pegged to EUR with the fixed ratio of 1.95583. So, 1 EUR is 1.95583 BGN, and it doesn't change over time, at least not yet.

1.95583 is EXACTLY the exchange rate between Euro and Deutsche Mark that I still remember from the switch in 2002. Indeed, after some research I've just learned that the Bulgarian Lev has been pegged to the DM since 1997.