In the beginning of 18th century it was rebuilt into a monastery.

His mother then became a nun and retreated into a monastery.

One does not normally have to fight one's way into a monastery.

We do not expect him, let us say, suddenly to go into a monastery.

He burned all his notes and men went into a monastery.

In 1133 he converted his own keep at Altenberg into a monastery.

Already in 1216 it was thought likely that he would die, or at least retire from the world into a monastery.

I think he'd only be happy if we turned the entire world into a monastery.

I wonder he didn't go into a monastery and live his life there.

During 15th century, the castle was turned into a monastery.