Question: Who controlled the holy land where the brand of Christianity practiced in the country where Vasilopita is lasted up until the 7th century?

Knowledge 1: Vasilopita
Vasilopita (, "Vasilópita", lit. '(St.) Basil-pie' or 'king pie', see below) is a New Year's Day bread or cake in Greece and many other areas in eastern Europe and the Balkans which contains a hidden coin or trinket which gives good luck to the receiver, like the Western European king cake. It is associated with Saint Basil's day, January 1, in most of Greece, but in some regions, the traditions surrounding a cake with a hidden coin are attached to Epiphany or to Christmas. It is made of a variety of dough, depending on regional and family tradition, including tsoureki. In some families, instead of dough, it is made from a custard base called galatopita (literally milk-pita). The pie is also known as Chronópita (Χρονόπιτα  χρόνος: "chrónos ⇨ time/year" + πίτα: "píta ⇨ pie"), meaning New Year's Pie. [SEP] Knowledge 2: Middle Ages
Religious beliefs in the Eastern Empire and Iran were in flux during the late sixth and early seventh centuries. Judaism was an active proselytising faith, and at least one Arab political leader converted to it. Christianity had active missions competing with the Persians' Zoroastrianism in seeking converts, especially among residents of the Arabian Peninsula. All these strands came together with the emergence of Islam in Arabia during the lifetime of Muhammad (d. 632). After his death, Islamic forces conquered much of the Eastern Empire and Persia, starting with Syria in 634–635 and reaching Egypt in 640–641, Persia between 637 and 642, North Africa in the later seventh century, and the Iberian Peninsula in 711. By 714, Islamic forces controlled much of the peninsula in a region they called Al-Andalus.The Islamic conquests reached their peak in the mid-eighth century. The defeat of Muslim forces at the Battle of Tours in 732 led to the reconquest of southern France by the Franks, but the main reason for the halt of Islamic growth in Europe was the overthrow of the Umayyad Caliphate and its replacement by the Abbasid Caliphate. The Abbasids moved their capital to Baghdad and were more concerned with the Middle East than Europe, losing control of sections of the Muslim lands. Umayyad descendants took over the Iberian Peninsula, the Aghlabids controlled North Africa, and the Tulunids became rulers of Egypt. By the middle of the 8th century, new trading patterns were emerging in the Mediterranean; trade between the Franks and the Arabs replaced the old Roman economy. Franks traded timber, furs, swords and slaves in return for silks and other fabrics, spices, and precious metals from the Arabs. [SEP] Knowledge 3: Sahara
The Byzantine Empire ruled the northern shores of the Sahara from the 5th to the 7th centuries. After the Muslim conquest of Arabia (Arabian peninsula) the Muslim conquest of North Africa began in the mid-7th to early 8th centuries, Islamic influence expanded rapidly on the Sahara. By the end of 641 all of Egypt was in Muslim hands. The trade across the desert intensified. A significant slave trade crossed the desert. It has been estimated that from the 10th to 19th centuries some 6,000 to 7,000 slaves were transported north each year.
Knowledge 1: Vasilopita
Vasilopita (, "Vasilópita", lit. '(St.) Basil-pie' or 'king pie', see below) is a New Year's Day bread or cake in Greece and many other areas in eastern Europe and the Balkans which contains a hidden coin or trinket which gives good luck to the receiver, like the Western European king cake. It is associated with Saint Basil's day, January 1, in most of Greece, but in some regions, the traditions surrounding a cake with a hidden coin are attached to Epiphany or to Christmas. It is made of a variety of dough, depending on regional and family tradition, including tsoureki. In some families, instead of dough, it is made from a custard base called galatopita (literally milk-pita). The pie is also known as Chronópita (Χρονόπιτα  χρόνος: "chrónos ⇨ time/year" + πίτα: "píta ⇨ pie"), meaning New Year's Pie. [SEP] Knowledge 2: Zinc
Brass, which is an alloy of copper and zinc, has been used since at least the 10th century BC in Judea and by the 7th century BC in Ancient Greece. Zinc metal was not produced on a large scale until the 12th century in India and was unknown to Europe until the end of the 16th century. The mines of Rajasthan have given definite evidence of zinc production going back to the 6th century BC. To date, the oldest evidence of pure zinc comes from Zawar, in Rajasthan, as early as the 9th century AD when a distillation process was employed to make pure zinc. Alchemists burned zinc in air to form what they called "philosopher's wool" or "white snow". [SEP] Knowledge 3: Israel
With the decline of Herodians, Judea, transformed into a Roman province, became the site of a violent struggle of Jews against Greco-Romans, culminating in the Jewish-Roman Wars, ending in wide-scale destruction, expulsions, and genocide. Jewish presence in the region significantly dwindled after the failure of the Bar Kokhba revolt against the Roman Empire in 132 CE. Nevertheless, there was a continuous small Jewish presence and Galilee became its religious center. The Mishnah and part of the Talmud, central Jewish texts, were composed during the 2nd to 4th centuries CE in Tiberias and Jerusalem. The region came to be populated predominantly by Greco-Romans on the coast and Samaritans in the hill-country. Christianity was gradually evolving over Roman paganism, when the area stood under Byzantine rule. Through the 5th and 6th centuries, the dramatic events of the repeated Samaritan revolts reshaped the land, with massive destruction to Byzantine Christian and Samaritan societies and a resulting decrease of the population. After the Persian conquest and the installation of a short-lived Jewish Commonwealth in 614 CE, the Byzantine Empire reconquered the country in 628.
Knowledge 1: Vasilopita
Vasilopita (, "Vasilópita", lit. '(St.) Basil-pie' or 'king pie', see below) is a New Year's Day bread or cake in Greece and many other areas in eastern Europe and the Balkans which contains a hidden coin or trinket which gives good luck to the receiver, like the Western European king cake. It is associated with Saint Basil's day, January 1, in most of Greece, but in some regions, the traditions surrounding a cake with a hidden coin are attached to Epiphany or to Christmas. It is made of a variety of dough, depending on regional and family tradition, including tsoureki. In some families, instead of dough, it is made from a custard base called galatopita (literally milk-pita). The pie is also known as Chronópita (Χρονόπιτα  χρόνος: "chrónos ⇨ time/year" + πίτα: "píta ⇨ pie"), meaning New Year's Pie. [SEP] Knowledge 2: Zinc
Brass, which is an alloy of copper and zinc, has been used since at least the 10th century BC in Judea and by the 7th century BC in Ancient Greece. Zinc metal was not produced on a large scale until the 12th century in India and was unknown to Europe until the end of the 16th century. The mines of Rajasthan have given definite evidence of zinc production going back to the 6th century BC. To date, the oldest evidence of pure zinc comes from Zawar, in Rajasthan, as early as the 9th century AD when a distillation process was employed to make pure zinc. Alchemists burned zinc in air to form what they called "philosopher's wool" or "white snow". [SEP] Knowledge 3: Hellenistic period
During the Hellenistic period, Judea became a frontier region between the Seleucid Empire and Ptolemaic Egypt and therefore was often the frontline of the Syrian wars, changing hands several times during these conflicts. Under the Hellenistic kingdoms, Judea was ruled by the hereditary office of the High Priest of Israel as a Hellenistic vassal. This period also saw the rise of a Hellenistic Judaism, which first developed in the Jewish diaspora of Alexandria and Antioch, and then spread to Judea. The major literary product of this cultural syncretism is the Septuagint translation of the Hebrew Bible from Biblical Hebrew and Biblical Aramaic to Koiné Greek. The reason for the production of this translation seems to be that many of the Alexandrian Jews had lost the ability to speak Hebrew and Aramaic.

Answer: Roman then Byzantine