The Library of Congress has over 450 digital collections and you may wish to feature several of them in a research guide. While it is acceptable to use the Link tool to link to a digital collection, a new option offers a way to utilize the existing "signature image" for the collection to make your presentation more visually pleasing.
The Library's Digital Collections site is the best place to discover all collections available from the Library. Use the link below to open up the page, and then follow the instructions below to filter/narrow the results to find the collection(s) you would like to feature:
Note that each collection has a signature image.