Besides manuscripts, what other form of Buddhist art was produced in the workshops of Nalanda and Vikramsila?

Bronze images

Answer:  Bronze images

Monasteries, such as Nalanda and Vikramsila were great centres of Buddhist learning, and art and numerous manuscripts were illustrated here with Buddhist themes and images of Vajrayana Buddhist deities on palm leaves. These centres also had workshops for casting of bronze images. Students and pilgrims from all over South East Asia came to these monasteries for education and religious instruction, and took back specimens of Pala Buddhist art in the form of bronze and illustrated manuscripts.