Ruínas da Igreja de Nossa Senhora do Rosário dos Pretos, Portuguese colonial church ruins in Natividade, Brazil.

The Ruínas da Igreja de Nossa Senhora do Rosário dos Pretos are remains of an 18th-century colonial church featuring stone walls and side chapel extensions. The standing structure displays Portuguese colonial architectural elements, including high walls and preserved details of the main building.

Construction of the church started in the 18th century, initiated by free Black community members. Though the project remained incomplete, religious services and celebrations took place in the partially finished building.

The church is dedicated to Our Lady of the Rosary, a devotion central to Black lay brotherhoods in colonial Brazil. Free Black members of the Irmandade do Rosário dos Pretos initiated the project and organized festivals in the unfinished building. The site lies in Natividade's historic centre, in the former gold-mining region of Tocantins.

The ruins stand on a slope above the historic centre of Natividade, in Tocantins, reachable on foot along the town's cobbled streets. The Programa Monumenta works added lighting and tidied the surrounding public space, but the walls and chapel extensions remain exposed to sun and rain, so visit in the dry months and wear shoes suited to uneven stone paving.

The central entrance arches feature specialized large bricks that reveal construction methods from the colonial mining period. This building technique shows the skilled craftsmanship applied to religious structures in mining regions.