Various alleys and through roads link via Portici with the backstreets and parallel roads, Dr. Streiter and Argentieri. Take one of these, vicolo della Pesa, and you can reach piazza del Grano, where the farmers' market was once held. It is one of the oldest places in Bolzano, once hosting the castle of the Prince-Bishops of Trento (destroyed in 1277 by Mainardo II di Tyrolo) and the church of Sant'Andrea (destroyed in 1785). One of the most picturesque buildings of the city is situated to the north of this square: la casa della Pesa (1634), public weigh-house until 1780.