Quadronno District
The name derives from a luxuriant blue river called "Codrono" present at the side of the Basilica of San Celso in Corso Italia 37, which was a Romanesque temple dating back to 840, of which half of the structure is original. The remaining part was rebuilt in 1822, however, reproducing the original forms. The name "Quadronno" is present in two documents dated 1170 and 1182 preserved in the Abbey of Chiaravalle, whose sourrounding lands all belonged to a noble family, where it takes the names of Cadronno, Cadrionno, Calletrono and Calledrono or Cadelono.