Why did the Council of Trent require every diocese to establish a seminary?

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Painting by Nicolo Dorigati showing the opening session of the Council of Trent, with clergy in white robes seated in a grand cathedral and an altar at the center. — Council of Trent Opening session of the Council of Trent in 1545, depicted by Nicolò Dorigati, 1711; in the Museo Diocesano Tridentino, Trento, Italy.

The Council of Trent required every diocese to establish a seminary to ensure the proper education and training of future clergy under church auspices.12

This mandate was a key component of the broader disciplinary reforms enacted during the Counter-Reformation to address internal corruption and improve the quality of pastoral care. By standardizing the education of priests, the church aimed to prepare them for a more austere life of service and to equip them to better fulfill their duties, particularly the task of preaching. These measures were part of a larger effort to consolidate the church, combat the influence of the Protestant Reformation, and ensure that the faithful were properly instructed.3214