* Regimini militantis Ecclesiae was the papal bull promulgated by Pope Paul III on September 27, 1540, which gave a first approval to the Society of Jesus, also known as the Jesuits, but limited the number of its members to sixty.

* September 27 – The Society of Jesus ( Jesuits ) is approved by Pope Paul III, in his bull Regimini militantis Ecclesiae.

Fresco of Approving of bylaw of Society of Jesus depicting Ignatius of Loyola receiving the papal bull Regimini militantis Ecclesiae from Pope Paul III.

Regimini militantis Ecclesiae ( Latin for To the Government of the Church Militant ) was the papal bull promulgated by Pope Paul III on September 27, 1540, which gave a first approval to the Society of Jesus, also known as the Jesuits, but limited the number of its members to sixty.

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The group of ' Friends in the Lord ' will ultimately form the nucleus of the Society of Jesus, approved in 1540 ( in Regimini militantis ecclesiae ).

In 1968, Pope Paul VI's apostolic constitution Regimini Ecclesiae Universae further enhanced the powers of the Secretary, placing him over all the other departments of the Roman Curia.

A charter was proposed to the Pope, which was received favourably and ultimately given solemn approval in this Regimini Militantis Ecclesiae of 1540.

Regimini Ecclesiae Universae ( in Latin ).

It later lost many of its powers, retaining only those relating to disciplining secular clergy, but still held onto its original name prior to Pope Paul VI's apostolic constitution Regimini Ecclesiae Universae of December 31, 1967, which renamed it the ' Congregation for the Clergy '.

With the Apostolic Constitution Regimini Ecclesiae Universae of 15 August 1967, Paul VI reformed the Roman Curia, implementing the desire expressed by the Bishops in the Second Vatican Council.

Following the Second Vatican Council, Pope Paul VI implemented many of the changes called for in the Curia with his Constitution Regimini Ecclesiae Universae of 15 August 1967.