Ancient History and First Mentions. The history of Basel is rooted in antiquity, when the strategically important bend of the Rhine was settled by the Celtic Raurici tribes. Archaeological evidence points to the existence of a fortified settlement on Cathedral Hill as early as the 1st century BC. Later, in 374 AD, the Roman historian Ammianus Marcellinus first mentioned a fortress named Basilia (presumably from the Greek "basileus"—royal). The Romans used this location as an important defensive point on the empire's border to control the river crossing.
Key Factors of Development. Basel's transformation from a military outpost into a thriving commercial center was driven by several decisive factors:
- Geographical Location: The city is located at the "Rhine knee"—the point where the river changes its flow direction. This made Basel a natural connection hub between the regions now occupied by Switzerland, France, and Germany.
- Bridge Construction: Around 1225, a bridge across the Rhine was built (Mittlere Brücke). It became one of the first permanent bridges on the Upper Rhine and redirected major trade routes through the city, ensuring its economic rise.
- Ecclesiastical Power: From the 7th century, the city became the seat of a bishop, which gave it high administrative status long before it joined the Swiss Confederation in 1501.
Cultural and Economic Flourishing. During the Middle Ages and the Renaissance, Basel developed a unique profile. In 1460, the University of Basel—the oldest in Switzerland—was founded here, becoming a magnet for humanists, including the famous Erasmus of Rotterdam. Thanks to the university and its favorable location, the printing industry flourished, and local print shops were renowned across Europe for the quality of their editions. The economic foundation was built by strong craft guilds, as well as the production of silk ribbons and textiles, which laid the groundwork for the city's modern chemical and pharmaceutical industries.