Portal:Bulgaria/Did you know/3


 * ...that 62% of the surface of the Pirin Mountains (peak pictured) is granite, and is therefore covered with mainly ancient metamorphic rock?


 * ...that the Crusade of Varna required simultaneous attacks on the Muslim Ottoman Empire by Christian Hungary and the Muslim Karamanids, which did not occur?


 * ...that the area on which Vrana Palace was constructed, just outside of Sofia, was initially purchased by Tsar Ferdinand I in 1898?


 * ...that mining has caused significant ecologically damage to the Timok River recently, and also from heavy metal industry in other cities?