After the founding, decades elapsed before the town was actually built. This delay was probably caused by an outbreak of civil war in Italy after Caesar’s death. It was not until the reign of the Emperor Augustus that the construction of the town began in 15 BC after another official founding. The town was built on the Augst plateau and a military camp was established in the plains towards the Rhine near Kaiseraugst. At that time, timber was the main material used in construction.