What is "frolois"

''' Frolois ''' is a commune in the Meurthe-et-Moselle department in north-eastern France. It is the site of the former fortified castle of Acraignes. The counts of Vaudémont were the first owners of Frolois, from the 13th century. The castle passed through numerous hands - Nicolas de Haraucourt acquired it in 1553, at the beginning of the 18th century it was rebuilt by Anne-Marie-Joseph de Lorraine-Harcourt, prince de Guise ; after the revolution the castle was sold as a national asset in 1795. No remains can be seen todayl.