This article needs additional citations for verification. (February 2020)
Jaci Casteḍḍu (Sicilian)
|Comune di Aci Castello|
|Metropolitan city||Catania (CT)|
|Frazioni||Aci Trezza, Ficarazzi, Cannizzaro|
|• Mayor||Carmelo Scandurra|
|• Total||8 km2 (3 sq mi)|
|Elevation||15 m (49 ft)|
(30 April 2017)
|• Density||2,300/km2 (6,000/sq mi)|
|Time zone||UTC+1 (CET)|
|• Summer (DST)||UTC+2 (CEST)|
|Patron saint||Saint Maurus Abbot|
|Saint day||January 15|
Aci Castello (Sicilian: Jaci Casteḍḍu) is a comune in the Metropolitan City of Catania in Sicily, Italy. The city is located 9 kilometres (6 mi) north of Catania on the Mediterranean coast. The primary economic sectors are agriculture and industry (in Catania). The city is neighbored by Aci Catena, Acireale, Catania, San Gregorio di Catania and Valverde.
The town of Aci Castello developed around the castle, which was built in 1076 by the Normans upon the foundations of a 7th-century Byzantine fortification. In 1169, Aci Castello started to expand after an eruption of Mount Etna made the towns in its vicinity uninhabitable. The castle later became the property of the bishops of Catania.
In 1296, Roger of Lauria, admiral of the Aragonese fleet during the War of the Sicilian Vespers, was granted the fief of Aci and its castle as a reward for his faithful service to King Frederick III of Sicily. When relations between the two men soured and di Lauria transferred his loyalties to the Angevins, the castle was besieged and captured by King Frederick and di Lauria stripped of his fiefs. In 1320, the castle and Aci were taken from Roger's descendant, Margaret of Lauria and given to Blasco II de Alagona. Whilst the latter was away defending Palermo from the attacking Angevins, Bertrando di Balzo sacked Aci in his absence.
- The Norman Castle, built from 1076 to 1081. It now serves as a museum.
- The borough Aci Trezza with a beach
- Church of St. Joseph (18th century)
- Greek Necropolis 
- "Superficie di Comuni Province e Regioni italiane al 9 ottobre 2011". Italian National Institute of Statistics. Retrieved 16 March 2019.
- "Popolazione Residente al 1° Gennaio 2018". Italian National Institute of Statistics. Retrieved 16 March 2019.
- "Discover the best places to visit in Catania: Aci Castello". Citymap Sicilia. Retrieved 2019-04-08.
- "Aci Castello e Acitrezza: What to see in the city - Visit Sicily". VisitSicily. Retrieved 2019-04-12.
- "Necropolis". britannica.com. Archived from the original on 2019-04-14. Retrieved 2019-04-14.