Dona Joaninha, Tender locomotive monument in Guarulhos, Brazil

Dona Joaninha is a black metal locomotive with a 2-6-4 wheel arrangement weighing 150 tonnes, displayed at Praca Paschoal Thomeu. The engine features a boiler, water tank, and sturdy construction designed for transporting sugar cane across rail routes.

The locomotive was manufactured by Bottene & Filhos in 1940 and transported sugar cane between Tamoio station and Araraquara until operations stopped in the 1960s. Its decline came as rail routes were gradually abandoned.

The locomotive is named after Dona Joana Morganti, owner of the Usina Monte Alegre workshop where it was assembled. It was the second engine built by João Bottene of Bottene & Filhos, inaugurated in January 1940. The name is painted on the restored black body, and the machine stands in Praça Paschoal Thomeu, site of the former Guarulhos station of the Cantareira Tramway.

The locomotive is accessible daily behind protective railings at the plaza. Evening lighting installed during the 2020 restoration makes it easy to see the machine's details when visiting after sunset.

The locomotive was built using components from an earlier rail engine, including its chassis and wheels, while the boiler and water tank were newly manufactured. This unconventional assembly makes it a rare example of industrial improvisation in Brazil.