He's just like his father

Several countries have in the past banned ruling queens, but lacked any requirement that the king be male. This led to King Anna of Poland, and King Mary of Hungary.

Written by Icelandic composer Jón Leifs in 1964, the piece called Hekla, Op 52, requires four sets of rocks hit with hammers, steel plates, anvils, sirens, cannons and metal chains to play.