This title page is from the Galliae (France) volume of Gerard Mercator's Atlas. The beautifully designed sheet is in the Mannerist style, composed of elaborate scrolls and volutes which are characteristic of this style, as well as decorative fruits, flowers, birds, and masks. At the top of the rectangular centerpiece is the portrait of a king, possibly representing Charlemagne, who was King of the Franks and Emperor of the Romans.
References: Shirley (TP) #17; Van der Krogt (Vol. I) #1:01.
A few minor creases on a bright sheet with a large "A" watermark.