The British School at Rome Archive (BSR) thanks to the Getty Foundation, made freely available digital copies of the John Bryan Ward-Perkins photographic collection. A website of the "BSR digital collections was created to present not only the photographic material (Photographs) but also other types of resources which follow into different categories: Maps, Prints, Documents, Postcards, Drawings, Paintings and Manuscripts".
But "the majority of the digital images displayed on the website are represented by the photographic prints and negatives from unique historic collections, including calotypes, glass and film negatives, slides and lantern slides."
The Letters of Philip II, King of Spain, 1592-1597 a digital collection available within the Special Collections Department of the Harold B. Lee Library, Brigham Young University, Provo, Utah, USA, is made of "... 174 letters and documents, all in Spanish : 172 manuscript, 2 printed.
"A listing of over 5000 websites describing holdings of manuscripts, archives, rare books, historical photographs, and other primary sources for the research scholar. All links have been tested for correctness and appropriateness."