Editing Nyon (section)

===Decline of the Roman colonia===
After a long period of peace and prosperity, signs of crisis and general insecurity were increasing in the early 3rd century. As a result of [[Alamanni]] invasions of 259 or 260 AD, the forum and the public buildings in the city were razed. The stone blocks were scattered all over the Lake Geneva region. The stones were re-used as building material, especially in Geneva, where about 300 were used in the construction of the wall. But the settlement was not abandoned. Nyon-Noviodunum, which had already lost much of its prestige and reputation was as a regional capital, now separated from [[Geneva]]. Geneva became the center and seat of the diocese which initially fought to administer the territory that had been part of the Colonia.<ref name=HDS_Colonia/>