Sanctuary of the Madonna di San Luca

**Bologna's most important annual tradition — and the reason the whole arcade exists.** ✅ **What happens**: once a year **the icon of the Virgin is carried from the church of San Luca on the hill down into the city** in procession, **stays some days in the cathedral of San Pietro**, **and is then carried back up** the hill. ✅ **The timing**: the procession falls in **spring**, tied to the Easter calendar — **usually around the fifth Sunday of Easter**; ⚠ **so the date moves each year**; check if you mean to catch it. ✅ **Its origin**: the tradition goes back to **1433**, when — by the account — **the icon was brought into the city and torrential rain that was threatening the harvest stopped**. **It was resolved to repeat it every year.** ✅ **Hence the arcade**: built in the **18th century** specifically **to shelter the procession from rain** along the whole climb — **a functional religious structure**, not ornament; **and funded by the families and guilds arch by arch**. ⚠ **What it means for you**: **if you coincide with the procession the whole city is in the street** and roads are closed; ✅ an extraordinary sight if you want it, ⚠ and an obstruction if you wanted a quiet visit.