The mission of Santa Ana de Velasco was the final World Heritage Site-inscribed mission to be established. It was founded by the Jesuit priest Fr. Julian Knogler in 1755. The original native inhabitants of the missions were the Covareca and Curuminaca tribes. The mission church was designed after the expulsion of the Jesuits between 1770 and 1780 by an unknown architect and built entirely by the indigenous population. The complex, consisting of the church, bell tower, sacristy and a grassy plaza lined by houses, is considered to have the most fidelity to the original plan of the Jesuit reductions. Starting in 1989 and lasting until 2001, the mission underwent partial restoration through the efforts of Hans Roth and his team.