Signatures are often hard to find. Sometimes they are just not there.
The most common practice is to sign only one window of a group made in a certain year, usually in the lower right corner of a window near the front of the church. The year may or may not be given, and the city and country may also be absent.
Sometimes large and obvious, but often almost invisibly tiny, signatures give fundamental information – the style of the artist, and the era and place in which the windows were made.
Become a glass archaeologist! Look very carefully along the bottom edges and you may discover a precious unknown signature. Use your phone to take a closeup picture and also a full shot of the the window. Then send it to us. You will be a published researcher/archaeologist!