Arches and bins

The street entrance to Milner Hall, where
stood the first Peterhouse, built in 1674, home of the Catholic priests of Winchester.

Through the archway stands the former Catholic chapel of St Peter, now called Milner Hall in memory of Reverend John Milner, who built it in 1792 the first Catholic church to be consecrated since 1558.

It's not the current Catholic church and mostly seems closed.