The 12 Anathemas of Saint Cyril were propositions that Cyril of Alexandria drew up in his 3rd Letter to Nestorius. Nestorius was outraged and a 'pamphlet war' began between the School of Antioch and School of Alexandria. There were mutual accusations of heresy and the result was that the two sides met at the Council of Ephesus in 431. The late arrival of the delegation from Antioch allowed Cyril to have the anathemas minuted and to see Nestorius condemned and deposed. The 12 Anathemas were the basis of the doctrinal decisions of the council.