The history of the city of Magé is inextricably linked to Brazil's colonial past and its economic development. Located deep within Guanabara Bay, this region initially gained strategic importance thanks to its port, which became a key link in the empire's transport chain.
A key factor in the city's formation was the port known as Porto da Estrela. During the colonial era, especially during the "Gold Cycle," it served as the main gateway for exporting gold and other valuable goods from the state of Minas Gerais to the capital, Rio de Janeiro, and onward to Portugal. Its geographical position made Magé a prosperous trading center through which numerous caravans passed.
The turning point in Magé's history came in the 19th century. The city entered the history books as the site where Brazil's first railroad was built. On April 30, 1854, the "Estrada de Ferro Mauá" line was ceremoniously opened—a project realized by the entrepreneur Irineu Evangelista de Sousa, who received the title of Baron of Mauá from Emperor Pedro II on the opening day. The first 14.5-kilometer section connected Porto de Mauá with Fragoso, a district of Magé. However, ironically, it was the development of the railway network, which bypassed the old river and pack-animal routes, that led to the gradual decline of the port and the diminishing economic importance of the city itself by the end of the century.