Prior to 18th century
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- 4th century BCE – Etruscans build wall around Arretium.[1]
- 294 BCE – Arretium attacked by Gallic forces.[1]
- 1st century BCE – Roman amphitheatre of Arezzo built.[2]
- 49 BCE – Arretium occupied by forces of Caesar.[3]
- 337 CE – Roman Catholic Diocese of Arezzo established (approximate date).[4]
- 1026 CE – Guido of Arezzo writes musical treatise Micrologus (approximate date).
- 1032 – Cathedral consecrated.[2]
- 1111 – Arezzo sacked by forces of Henry V, Holy Roman Emperor.[5]
- 13th century – Santa Maria della Pieve church remodelled.
- 1215 – University of Arezzo founded.
- 1248 – Guglielmino Ubertini becomes bishop.[5]
- 1262 – Fraternita dei Laici founded.[2]
- 1278 – Arezzo Cathedral construction begins.
- 1288 – Battle of Pieve al Toppo fought in Siena; Aretine forces win.
- 1289 – Battle of Campaldino fought near town; Florentines win.[6]
- 1290 – Basilica of San Francesco, Arezzo, start of construction of church of St. Francis inside the city walls
- 1304 – Future poet Petrarch born in Arezzo.[5]
- 1312 – Guido Tarlati becomes bishop.[5]
- 1320 – Town wall built.[6]
- 1375
- Chiesa di San Bernardo (Arezzo) (church) built.
- Palazzo della Fraternita dei Laici construction begins.
- 1384 – Enguerrand VII, Lord of Coucy sells Arezzo to Florentines; town becomes part of the Republic of Florence (until 1859).[5][1]
- 1409 – Rebellion against Florentine rule.[1]
- 1444 – Santa Maria delle Grazie church built.[2]
- 1466 – Piero della Francesca paints Storie della Vera Croce in the Basilica of San Francesco, Arezzo.[2]
- 1511 – Future artist Giorgio Vasari born in Arezzo.[7]
- 1529 – Rebellion against Florentine rule.[1]
- 1560 – Fortezza Medicea (Arezzo) (fortification) built (approximate date).[7]
