The Trinity Lavra of St. Sergius is a lavra and the most important Russian monastery, being the spiritual centre of the Russian Orthodox Church. The monastery is situated in the town of Sergiyev Posad, about 70 kilometres (43 mi) to the northeast from Moscow by the road leading to Yaroslavl, and currently is home to over 300 monks.

A lavra or laura is a type of monastery consisting of a cluster of cells or caves for hermits, with a church and sometimes a refectory at the center. Lavra monasteries operate within the Orthodox and other Eastern Christian traditions; the name is also used by some Catholic communities. The term in Greek initially meant a narrow lane or an alley in a city.