100 Pesetas - Juan Carlos I Prado Museum

The 1994 "Prado Museum" 100 pesetas was part of Spain's long-running commemorative circulation series issued through the final decade before euro adoption. The Prado series specifically coincided with the museum's 175th anniversary — it opened to the public in November 1819 under Ferdinand VII, originally conceived as a natural history museum before its purpose shifted entirely to royal art collections.

Aluminium bronze of this specific alloy was chosen across Spain's higher-denomination circulation coins partly for its resistance to the chemical corrosion common in vending machine environments, a practical concern that drove mint specifications across much of southern Europe in the 1990s.