The Optina Pustyn (Russian: Óптина пýстынь, romanized: Óptina pústyn', literally Opta's hermitage) is an Eastern Orthodox monastery for men near Kozelsk in Russia. In the 19th century, the Optina was the most important spiritual centre of the Russian Orthodox Church and served as the model for several other monasteries, including the nearby Shamordino Convent. It was particularly renowned as the centre of Russian Orthodox eldership (staretsdom).