Heyden is identified below the image as "Rector der Schule zu S: Sebaldi in Nürnberg." 98 x 70 mm.
Slightly browned; laid down to mounting paper.
"Heyden was recognized widely as a teacher, highly learned man and musician, but he was most important for his contributions to music theory." Victor H. Mattfeld et al. in Grove Music Online.
Price: $175.00 other currencies