Sinjska alka! Finally finished that WIP.
This competition, while celebrating the grand victory of Croatia over the Ottoman empire in 1715 in the town of Sinj, also has roots in chivalry, so no wonder they are all dressed up really cool and flashy. Especially the Duke (Vojvoda), his costume is the one decorated the most, especially with golden details, while other alkars are adorned mostly with silver or gold-ish details.
The Alka is exclusively held in Sinj, and alkars are exclusively the people of Sinj or surrounding villages/small towns, but there were as a matter of fact three occasions when it was held outside of Sinj; and out of that, the only time outside of Croatia was actually in Belgrade, in 1922.