In the following centuries it was inhabited by different peoples, among whom were the Etruscans, who founded the city of Mantua and spread the use of writing. It was seat of the Celtic Canegrate culture (starting from the 13th Century BC) and later of the Ligurian Golasecca culture. Later, starting from the 5th century BC, the area was invaded by more Celtic Gallic tribes coming from north of the Alps.. These people settled in several cities including Milan, and extended their rule to the Adriatic Sea.