About 1354 Saint Sergius of Radonezh, the founder of the Trinity monastery, was visited by envoys from Patriarch Philotheus, urging him to introduce a community rule into his monastery, as the Byzantines placed increased value on Cenobitic monasticism in this period. After some hesitation, Saint Sergius complied with this request, and the Trinity monastery, by adopting the Studite Constitution, became the model for all other late medieval Russian "koinobia." Secondly, the monastery's close links with Constantinople facilitated the spread of Hesychasm to Central and Northern Russia.