Chapelle St-Germain, Querqueville

On a hill in Querqueville, now seemingly a suburb of Cherbourg, is the oldest religious building in the Cotentin area, the Chapelle St-Germain, 10th century. It sits right next to the Querqueville parish church, but the chapel was locked up tight and there was no information at all about it. Alas. Disappointment.

Thus

A tower and narthex with three circular wings; slit windows;
this was an age when churches had to be redoubts, if not
fortresses

The tower

Construction material, sort of a herring-bone look?

At least the view across the top of the peninsula was great