What do we call a medieval marketplace event with many sellers?

The story behind the answer

In medieval Europe, large, periodic trading gatherings were chartered by kings or lords and drew many merchants from distant regions. Unlike a weekly local market, these events lasted days or weeks and were designed for long-distance commerce. “Bazaar” refers mainly to Middle Eastern marketplaces, and a festival centers on celebration, not trade—so the medieval term for a multi-seller marketplace event fits this larger, occasional, commerce-focused gathering.

These gatherings were economic engines: they offered safe-conducts and tax privileges, standardized weights and measures, and turned towns into temporary international hubs for cloth, wine, spices, and livestock. The Champagne gatherings of 12th–13th‑century France famously linked Italian and Flemish merchants and spurred innovations like bills of exchange and early banking practices, shaping Europe’s commercial networks long before permanent trading centers took over.