The São Sebastião Cathedral is located in Rio de Janeiro, Brazil. It is known for its unique modernist architecture, designed by the architect Eugênio de Castro. The cathedral was consecrated in 1979 and can accommodate around 5,000 people. Its striking conical shape and stained glass windows are notable features. The cathedral is dedicated to Saint Sebastian, the patron saint of Rio de Janeiro. It serves as the seat of the Archdiocese of Rio de Janeiro and plays a significant role in the city's religious and cultural life. Visitors often admire its impressive interior and the peaceful atmosphere it offers.