45 The annals of your sacred missions admirably testify to the truth of this law. Some attempted, usually unsuccessfully, to replace Catholic missions with those of lay people. On the other hand those apostolic men Francis Xavier and John de Brito contributed not only to the spiritual salvation of souls, but also to the greater expansion of the fortunes of Portugal. Therefore follow them with fitting emulation.
Source: Saeculo Exeunte Octavo (Vatican.va)