500 Francs Colossus of Rhodes

The Colossus of Rhodes collapsed in 226 BC following an earthquake, and Ptolemy III of Egypt reportedly offered to fund its reconstruction — an offer the Rhodians declined after an oracle warned against it. The statue lay in ruins for nearly nine centuries before Arab forces sold the bronze for scrap around 654 AD. Rwanda's connection to this subject is purely commercial: the National Bank issued this as part of a wider series of Seven Wonders coins aimed squarely at the collector market, with the colored niobium centre doing the visual work that the subject matter alone couldn't sustain.