Poseidonia
Template:Short description {{#invoke:Hatnote|hatnote}} Template:Infobox Greek Dimos Poseidonia (Template:Langx, named after Poseidon) is a village and a former municipality on the island of Syros, in the Cyclades, Greece. Since the 2011 local government reform it is part of the municipality Syros-Ermoupoli, of which it is a municipal unit.<ref name=Kallikratis>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> The population was 4,114 inhabitants at the 2021 census, and the land area is 23.705 km².<ref name=stat01>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> The municipal unit shares the island of Syros with the municipal units of Ano Syros and Ermoupoli. It is also known as Dellagrazia (name taken from a small church of Maria della Grazia).