The municipality is formed in the middle of the twentieth century, in three stages, the union of the previous four:
• Castle, formed by various towns: Sommavilla, Well, Menerolo (now Absence), Castle (town), Castel di Sotto, Porto, Venzo, Zignago, Sengiarine, Snitch
• Marniga, comprising the villages of Magugnano (now the Town Hall) and Field
• Castelletto, including the towns of Castelletto, Biaza, Fasor and Pasola
• Prada, comprising the towns of Prada High, St. Francis (now joined Prada Alta), Val di Fies and Chemasi (now part of Brenzone), and Prada Low Senaga (now part of the municipality of San Zeno di Montagna).
After the First World War, the town of Prada was abolished and divided between the municipalities of San Zeno di Montagna (Prada Low and Senaga), Castelletto (Prada High, St. Francis) and Castle (Val di Fies and Chemasi).
After the Second World War, the town of Marniga was suppressed and united with that of Castelletto.
In 1955 also the town of Castello was suppressed and united in Castelletto. In 1958 the then town of Castelletto took the name of Brenzone and finally in 1960 the town was officially created diBrenzone which included the territory of the former town of Castelletto. He stood still Castelletto municipal seat until 1967 when it was decided to move the town in the village of Magugnano where there were already a large part of the offices.
Church of San Zeno, St. Nicholas Church, St. Peter’s Church, Church of St. Anthony, the Ethnographic Museum Mantovani, Villa Romana, Castelletto Stone
Lake fish of Garda lake, Olive Oil of Garda dop,