Parallel (geometry) as a pair of straight lines in a plane which do not meet appears as Definition 23 in Book I of Euclid's Elements. Alternative definitions were discussed by other Greeks, often as part of an attempt to prove the parallel postulate. Proclus attributes a definition of parallel lines as equidistant lines to Posidonius and quotes Geminus in a similar vein. Simplicius also mentions Posidonius' definition as well as its modification by the philosopher Aganis. At the end of the nineteenth century, in England, Euclid's Elements was still the standard textbook in secondary schools. The traditional treatment of geometry was being
Greek Orthodox Patriarchate of Alexandria and all Africa visited first Uganda, and later Kenya. Spartas, however, also made contact with Fr Nikodemos Sarikas, a missionary priest in Tanganyika, and through him made contact with the Greek Patriarch of Alexandria. In 1946 the African Orthodox groups in Kenya and Uganda were received into the Greek Orthodox Patriarchate of Alexandria. 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