In 1596, Hovius was consecrated the third Archbishop of Mechelen.[1] Among his accomplishments were the founding of a seminary[2] and the creation of a catechism with help from the Jesuits. The Mechelen Catechism remained a standard in Catholic religious education in Belgium until well into the twentieth century.
On 14 November 1599 he installed Joanne Berkeley as the first abbess of a new Benedictine convent in Brussels. The new convent had been approved by the pope and the local authorities and it was funded by Mary Percy who was one of the first nuns.[3]
In 1607, Hovius convened a provincial council in Mechelen to implement the decrees of the Council of Trent in the archdiocese.[2] After an official enquiry, in 1604, Hovius approved the cult of Our Lady of Scherpenheuvel, [4] In 1606, the newly constructed shrine received a papal indulgence. He also promoted the veneration of the Martyrs of Gorkum. He was supported in his efforts by Albert and Isabella of Austria, Governors-General of the Spanish Netherlands.
^Boni, Armand (1953). Scherpenheuvel: Basiliek en gemeente in het kader van de vaderlandse geschiedenis. Standaard
Laenen, Kan. Dr. J. (1930), Geschiedenis van het Mechelsch Seminarie vanaf het Episcopaat van Aartsbisschop Matthias Hovius tot onder Z.E. Kardinaal van Roey, Mechelen, Gebr. Laurent, 393 pp.