Jacob Joseph (Jack) Glatzer is an American violinist who resides in Portugal. He has performed as a soloist in North and South America, Europe, Asia, Africa, and Australia, and has also released several acclaimed recordings. Glatzer specializes in the literature for solo violin, such as the unaccompanied works of Bach, Paganini, Bartók, and Locatelli, and calls upon his strong academic background in world history and civilization in presenting frequent lecture-recitals of the solo violin literature.