Ethiopian Christianity is one of the oldest forms of Christianity, dating back to the 4th century when it became the state religion of the Kingdom of Aksum. It is characterized by its unique traditions, including the use of the ancient Ge'ez language in liturgy and the observance of distinctive religious practices. The Ethiopian Orthodox Tewahedo Church is the largest denomination, emphasizing the importance of the Bible and the teachings of the Apostles. Ethiopian Christians celebrate numerous religious festivals, such as Timkat (Epiphany) and Fasika (Easter), which are marked by vibrant processions and rituals. The church also has a rich artistic heritage, evident in its ancient rock-hewn churches, particularly in Lalibela, which are recognized as UNESCO World Heritage Sites.