Is the stained glass old or contemporary? Sometimes we imagine that stained glass necessarily has a religious connection, when actually it can be used for many types of decor and artistic uses, both in long-ago history and today. I doubt it has any Jewish connection.
Interestingly, when I Googled "Mega V", I found references to a Pokemon video game and to a Mega V natural herbal "Viagra". Maybe the herbal Mega V worked so well that someone built a stained glass cathedral in gratitude and praise?