The Torre Aquila is a square 13th-century tower in the outer ring of the Castello del Buonconsiglio, given over almost entirely to one of the most important works of late-medieval secular painting in Europe: the Ciclo dei Mesi, a series of panels showing the months of the year in scenes of peasant labour and aristocratic leisure.
The tower is accessed separately from the main castle visit, with timed-entry tickets and strict limits on group size (typically 20 visitors at a time). The detail rewards a slow look — a peasant warming his hands at a fire in February, a snowball fight between courtiers in January, a hunt with falcons in May. It is the single most rewarding 20 minutes in Trento.