Paulose Mor Athanasius, popularly known as Aluvayile Valiya Thirumeni, was a Syriac Orthodox bishop who served the 18th Malankara Metropolitan of the Malankara Syriac Orthodox Church from 1918 to 1953 and also the Metropolitan of the Angamaly Diocese of the Malankara Syriac Orthodox Church.
The Feast of Mor Athanasius is held annually on 26 January.
On 25 November 1898, Valiya Thirumeni was ordained as a priest (Qashisho) by Saint Geevarghese Mar Gregorios Chathuruthiyil. On 28 November, he was elevated to monk (ramban).
In December 1917, head of Patriarch faction Kochuparambil Paulose Mor Koorilos died, Valiya Thirumeni was selected to lead the Patriarch Faction of Malankara Church. He took office in January 1918.
Valiya Thirumeni died on 25 January 1953 at the age of 84. The next day he was buried at the northern side of the madbho (altar) of St. Mary's Church in Thrikkunnathu Seminary.