Cassandreia (Ancient Greek: Κασσάνδρεια - Kassandreia) was once one of the most important cities in Ancient Macedonia, founded by and named after Cassander in 316 BC. It was located on the site of the earlier Ancient Greek city of Potidaea, at the isthmus of the Pallene peninsula. The fact that Cassander named it after himself suggests that he may have intended it to be his capital, and if the canal which cuts the peninsula at this point was dug or at least planned in his time, he may have intended to develop his naval forces using it as a base with two harbours on the east and west sides. Cassandreia soon became a great and powerful city, surpassing the other Macedonian towns in wealth. Philip V of Macedon made Cassandreia his main naval base. At the end of the Roman Republic, a Roman colony was settled around 43 BC by the order of Brutus, by the proconsul Q. Hortensius Hortatus. The official name of the colony was Colonia Iulia Augusta Cassandrensis. The colony enjoyed ius Italicum, and is mentioned in Pliny the Elder's encyclopaedia and in inscriptions. It was destroyed by the Huns and Slavs around 540 AD.
- F. Papazoglou, Les villes de Macédoine à l'époque romaine, Supplément du BCH 16, Athens, 1988.
- D. Samsaris, La colonie romaine de Cassandréa en Macédoine. Colonia Iulia Augusta Cassandrensis (The Roman Colony of Cassandra in Macedonia. Colonia Iulia Augusta Cassandrensis). Dodona 16(1), 1987, 353-437.
- John R. Melville-Jones, 'L'ixola di Caxandria' in Thesaurismata 27, 1997, 125-138.