1 Dollar - Elizabeth II Sanssouci

Sanssouci, Frederick the Great's Rococo retreat in Potsdam, was built between 1745 and 1747 against the explicit advice of his architects, who warned the shallow foundations would cause structural problems almost immediately — and they were right. Cook Islands has issued gold-plated copper pieces under its authority since the 1970s largely as a revenue mechanism, with collector issues bearing no meaningful connection to the territory itself.