ArchiveGrid -- Open the door to history

ArchiveGrid -- Open the door to history: "ArchiveGrid is an important destination for searching through historical documents, personal papers, and family histories held in archives around the world.

Thousands of libraries, museums, and archives have contributed nearly a million collection descriptions to ArchiveGrid. Researchers searching ArchiveGrid can learn about the many items in each of these collections, contact archives to arrange a visit to examine materials, and order copies."