France, Jan. 28 -- A French heritage association has appealed to authorities for the return of six stained-glass windows that were allegedly stolen from Rouen Cathedral over a century ago and are now housed in three museums in the United States.

The president of Paris-based heritage association Lumiere sur le Patrimoine, Philippe Machicote, filed a complaint in mid-December with the Rouen public prosecutor, who now has two months left to make a decision.

The complaint for "concealment of theft" concerns the Glencairn Museum in Bryn Athyn (Pennsylvania), the Worcester Art Museum (Massachusetts) and the Metropolitan Museum of Art (New York).

Machicote told regional newspaper Ouest-France the windows, which he describes as "imprescriptibl...