The precise height of Musala was only measured in 1932 by an expedition of the State Geographic Institute of the Ministry of War. Previously, Vihren in southwest Bulgaria was imprecisely measured and proclaimed to be the country's highest peak. This made Mytikas on Mount Olympus in Greece, which rose only three metres higher than Vihren, the highest on the Balkan Peninsula. Locals in Bulgaria supposedly began piling up rocks on Vihren over time to restore its status, but the 1932 military expedition measured both Vihren and Musala with a margin of error of only 15 centimetres and thus put an end to the rivalry.