The hallmark of the palace, not just in the Manueline era but in all its history, was its "Tower of the King", in the southern wing. During the Manueline era, the Casa da Índia was installed in the tower, which hoisted a large sculpture of the Royal Coat of Arms of Portugal on the exterior of the tower, facing the river. Starting in 1525, King John III sponsored a set of enlargements and renovations to the palace, which, most notably, altered the "Tower of the King", expanding it and opening a large balcony, faced towards the Tagus.