The Wenceslaus Hollar collection is made available using the International Image Interoperability Framework (IIIF) standard. You can use IIIF tools to compare Hollar prints across institutional digital collections.

For example, the image viewer below compares the Parthey Pennington Number P2159 print held U of T with P2159 from the Folger Shakespeare Library Digital Collections.  

Using the image viewer below, scroll through the instructions on the bottom of this page to learn how to compare images from the U of T Hollar collection, the Folger Hollar digital collection, and any other IIIF-enabled digital collections you come across.