erected in honour of the fighters of the Greek Resistance, as in these areas the Resistance was very active: the monument of Greek National Resistance in Sykies, the monument of Greek National Resistance in Stavroupolis, the Statue of the struggling Mother in Eptalofos Square and the monument of the young Greeks who were executed by the Nazis on 11 May 1944 in Xirokrini. In Eptalofos, on 15 May 1941, one month after the occupation of the country, the first resistance organization in Greece, "Eleftheria", was founded, with its newspaper and the first illegal printing house in the city of Thessaloniki. Today southeastern Thessaloniki has in some way become an extension of the city centre, with the avenues of Megalou Alexandrou, Georgiou Papandreou (Antheon), Vasileos Georgiou, Vasilissis Olgas, Delfon, Konstantinou Karamanli (Nea Egnatia) and Papanastasiou passing through it, enclosing an area traditionally called (, lit. Dépôt), from the name of the old tram station, owned by a French company. The municipality of Kalamaria is also located in southeastern Thessaloniki and was firstly, inhabited mainly by Greek refugees from Asia Minor and East Thrace after 1922. There are built the Northern Greece Naval Command and the old royal palace (called Palataki), located on the most westerly point of Mikro Emvolo cape. Paleochristian and Byzantine monuments (UNESCO) Because of Thessaloniki's importance during the early Christian and Byzantine periods, the city is host to several paleochristian monuments that have significantly contributed to the development of Byzantine art and architecture throughout the Byzantine Empire as well as Serbia. The evolution of Imperial Byzantine architecture and the prosperity of Thessaloniki go hand in hand, especially during the first years of the Empire, when the city continued to flourish. It was at that time that the Complex of Roman emperor Galerius was built, as well as the first church of Hagios Demetrios. By the eighth century, the city had become an important administrative centre of the Byzantine Empire, and handled much of the Empire's Balkan affairs. During that time, the city saw the creation of more notable Christian churches that are now part of Thessaloniki's UNESCO World Heritage Site, such as the Church of Saint Catherine, the Hagia Sophia of Thessaloniki, the Church of the Acheiropoietos, the Church of Panagia Chalkeon. When the Ottoman Empire took control of Thessaloniki in 1430, most of the city's churches were converted into mosques, but have survived to this day. Travellers