Optina Monastery is a historic Orthodox Christian monastery located in the Kaluga region of Russia. Founded in the 14th century, it became a significant spiritual center known for its Elders, who provided guidance and counsel to many pilgrims and visitors seeking spiritual wisdom. The monastery features beautiful architecture, including the main cathedral, Holy Trinity Cathedral, and several other churches and buildings. It played a vital role in the Russian spiritual revival during the 19th century and continues to be an important site for Orthodox Christians today, attracting visitors for both its religious significance and serene surroundings.