100 Manat Olympic stadium of Ashgabat

The Ashgabat Olympic Stadium, inaugurated in 2017 to host the fifth Asian Indoor and Martial Arts Games, was built at enormous state expense as part of Gurbanguly Berdimuhamedov's sweeping architectural transformation of the capital — a project that ultimately earned Ashgabat a Guinness World Record for the highest concentration of white marble-clad buildings in the world. Turkmenistan spent an estimated $5 billion on infrastructure for those games alone.

The .916 fine standard — 22-karat — follows a traditional coinage alloy preference rather than the .999 fine now dominant in modern bullion issues.