Rui Manuel Sousa Valério, SMM (born 24 December 1964), officially Dom Rui I,[2] is a Portuguese prelate of the Catholic Church and a member of the Missionaries of the Company of Mary (Monfortans) who has been the Patriarch of Lisbon since September 2023.

Rui Manuel Sousa Valério was born on 24 December 1964 in Urqueira, Ourem, Portugal.

[5] He entered the Monfortan Seminary in Fatima at the age of 11, became a novice in 1984 in Santeramo in Colle, Bari, Italy, and took his first vows on 6 September 1985.

[6] He took his vows as a Monfortan on 6 October 1990 and was ordained a priest for that order on 23 March 1991[3] in the Cova da Iria neighborhood of Fátima by Bishop Alberto Cosme do Amaral.

[3] He received his episcopal consecration on the following 25 November,[7] and he was installed on 11 December at the Igreja da Memória, the Cathedral of the Diocese of the Armed and Security Forces.