In the 1950s, however, the Orthodox Church in Kenya suffered severe oppression at the hands of the British colonial authorities during the Mau Mau Uprising. Most of the clergy were put in concentration camps, and churches and schools were closed. Only the Cathedral in Nairobi (which had a largely Greek membership) remained open. Archbishop Makarios III of Cyprus preached an anti-colonialist sermon at the cathedral on his way home from exile, and this led to friendship between him and the leader of the anti-colonial struggle in Kenya, Jomo Kenyatta.