Ilha da Paz Lighthouse, Maritime navigation structure in São Francisco do Sul, Brazil

The Ilha da Paz Lighthouse is a white stone structure in São Francisco do Sul that rises above the keeper's residential quarters attached to its base. The tower was designed specifically to guide ships navigating into the harbor entrance.

A lighthouse on Ilha da Paz was already proposed in an 1867 report by the Minister of the Navy to improve coverage of the Brazilian coast. Construction began in 1905 under Captain-Lieutenant Arnaldo Siqueira Pinto da Luz, using the island's abundant stones, and the station was inaugurated on 20 August 1906. Its first keeper was Leovegildo Osorio. In 1982 the light was electrified, and in 1989 a fourth-order lens from the São Tomé lighthouse was installed.

The island's place names — Penixe, Portinho, Ponta do Sul, Saco do Venâncio, Pedra do Frade, Coruja, Paredão, Pomar and Fonte do Cafeeiro — are still used to distinguish its different spots. The first keeper, Leovegildo Cezar da Fonseca Ozório, stayed more than twenty years; two daughters born there were named Maria da Paz and Maria da Graça, after the island and the Graças archipelago.

Access is by boat from São Francisco do Sul, about 30 minutes away. The island has no regular public transport, so visits depend on authorised crossings. The anchorage at Porto do Penixe has a concrete bridge 8 metres long and 2.5 metres wide, usable by vessels drawing up to 2 metres at low tide. The island has two drinking-water springs, Cafeeiro and Saco do Venâncio, and three cisterns holding 60,000 litres of rainwater.

The light is white, flashing for 3.5 seconds and dark for 16.5 seconds in each 20-second cycle, with a focal height of 84 m and a range of 26 nautical miles. The original 1894 Barbier et Cie rotating hexagonal lens, imported in 1905, was replaced in 1989 by a fourth-order lens taken from the São Tomé lighthouse in Rio de Janeiro.