Chandris Line was a Greece-based shipping company founded in 1960 by Antony Chandris to operate ocean liners between Greece and Australia. Initially the company also traded under the names Greek Australian Line, National Greek Australian Line and Europe-Australia Line. Following a period of expansion, in 1974 Chandris Line merged with Chandris Cruises—a separate company founded in 1960 by Anthony Chandris' brother Dimitri Chandris to operate cruises in the Mediterranean—to form Chandris Line Chandris Cruises. After 1977 the company concentrated solely on cruising and was rebranded Chandris Cruises. In 1985 Chandris Cruises acquired Fantasy Cruises, and subsequently their North American operations were rebranded as Chandris Fantasy Cruises. The company ceased trading in 1996. All of the company's ships had a chi, a letter of the Greek alphabet, on their funnels. The chi also acted as a logo for them and their subsidiary Celebrity Cruises.
In 1959 Anthony J. Chandris, son of the Greek freight shipping company owner John D. Chandris, decided to establish a new passenger shipping company to carry migrants from Europe to Australia. Together with his brother Dimitri Chandris, Anthony Chandris had previously been involved in Charlton Steam Shipping Company's failed migrant service in the 1940s, but now wanted to attempt entering the migrant trade again. In October 1959 Anthony Chandris purchased RMS Bloemfontein Castle from Union-Castle Line for £1.5 million as the first ship of the new Chandris Line. Following delivery to Chandris Line on 19 November 1959 the Bloemfontein Castle was renamed Patris and rebuilt with increased passenger capacity for migrant service. Anthony Chandris made two contracts to increase the profitability of the ship: with the Intergovermental Committee on European Migration to carry assisted migrants from Europe to Australia; and with the Greek Government to carry mail from Greece to Australia. As a result, the Patris gained the right to use the Royal Hellenic Mail Ship (RHMS) ship prefix, therefore becoming known as RHMS Patris. Following rebuilding the Patris first departed Piraeus with Captain Zannis X.Xenios, on 14 December 1959, arriving in Fremantle, Australia on 2 January 1960 and her final Australian destination, Sydney on 9 January 1959. Initially the Patris' operator was marketed as Greek-Australian Line, later National Greek-Australian Line.