Prima Legio Minervia, seems to have served here the longest. Units of the Bonn legion were deployed to theatres of war ranging from modern-day Algeria to what is now the Russian republic of Chechnya.
The chief Roman road linking the provincial capitals of Cologne and Mainz cut right through the fort where it joined the fort's main road (now, R�merstra�e). Once past the South Gate, the Cologne-Mainz road continued along what are now streets named Belderberg, Adenauerallee et al. On both sides of the road, the local settlement, Bonna, grew into a sizeable Roman town.
In late antiquity, much of the town seems to have been destroyed by marauding invaders. The remaining civilian population then holed up inside the fort along with the remnants of the troops stationed here. During the final decades of imperial rule, the troops were supplied by Germanic chieftains employed by the Roman administration. When the end came, these troops simply shifted their allegiances to the new barbarian rulers. From the fort, the Bonnburg, as well as from a new medieval settlement to the South centred around what later became the minster, grew the medieval city of Bonn.
Between the 11th and 13th centuries, the Romanesque style Bonn Minster was built, and in 1597 Bonn became the seat of the Archdiocese of Cologne. The town gained more influence and grew considerably. The elector Clemens August (ruled 1723-1761) ordered the construction of a series of Baroque buildings which still give the city its character. Another memorable ruler was Max Franz (ruled 1784-1794), who founded the university and the spa quarter of Bad Godesberg. In addition he was a patron of the young Ludwig van Beethoven, who was born in Bonn in 1770; the elector financed the composer's first journey to Vienna.
In 1794, the town was seized by French troops, becoming a part of the First French Empire. In 1815 following the Napoleonic Wars, Bonn became part of the Kingdom of Prussia. Administered
