Ethiopian Orthodox priests lead a procession of faithful into Abraha Atsheba Church to celebrate Timkat (Epiphany), the church's most important Holy Day. Ethiopia is Africa's oldest Christian nation where more than half the population follows the Ethiopian Orthodox faith. Priests wear colourful vestments while silk brocade umbrellas shade them from the sun.Abraha Atsbeha is a rectangular rock-hewn church built between the 4th and 10th centuries AD. It is decorated with splendid post-17th century murals and paintings depicting Biblical scenes and Saints. It is one of the most highly revered churches in Ethiopia.