Túpac Katari (born Julián Apasa Nina) and his wife Bartolina Sisa were Aymara leaders who led indigenous rebellions against the Spanish, most famously when they and an army of around 40,000 laid siege to La Paz for 184 days in 1781. A second siege later the same year was unsuccessful. Both were captured and executed by the Spanish, and have been seen as heroes and symbols of resistance by many indigenous Bolivians and left wing political groups since.