1500 Guaraníes Ruins of Humaitá

Humaitá was the fortified river position where Paraguayan forces held off a combined Brazilian, Argentine, and Uruguayan naval assault for nearly three years during the War of the Triple Alliance — a conflict that killed an estimated 60 to 70 percent of Paraguay's male population by its end in 1870. The ruins of the church there became a national symbol of resistance precisely because so little else survived to memorialize it.

This issue belongs to a broader 1975 commemorative gold series produced under Stroessner's government, largely targeting the international collector market rather than domestic circulation.