The history of the arrival of Islam in Indonesia is somewhat unclear. One theory states that Islam arrived directly from Arabia as early as the 9th century, during the time of the Umayyad and Abbasid caliphates. Another theory credits Sufi travelers for bringing Islam in the 12th or 13th century, either from Gujarat in India or from Persia. Before the archipelago's conversion to Islam, the predominant religions in Indonesia were Hinduism and Buddhism.

Central Java is a province of Indonesia, located in the middle of the island of Java. Its administrative capital is Semarang. It is bordered by West Java in the west, the Indian Ocean and the Special Region of Yogyakarta in the south, East Java in the east, and the Java Sea in the north. It has a total area of 33,750.37 km2, with a population of 36,516,035 at the 2020 Census making it the third-most populous province in both Java and Indonesia after West Java and East Java. The official population estimate in mid-2023 was 37,608,336 The province also includes a number of offshore islands, including the island of Nusakambangan in the south, and the Karimun Jawa Islands in the Java Sea.