History of Turkey
Archives and Archiving
Where can I access documents, archives of the Ottoman Empire online?
, Yesterday is history. Kung fu Panda.
You have to know that all of the Ottoman documents, pictures and maps are written in Ottoman Turkish. So at first place you have to aware of it. The Ottoman archive is the largest archive you will find on earth. Most of it is in Istanbul. The library of congress has amazing collection of photographs.
I’d advice you to contact any Turkish historian, there are plenty of them especially if you’re searching for something documented.
There are many archive websites, like Archive.org , the Gutenberg Press, the Vatican archives, the London archives, and The Library of Congress.
Turkish and Hungarian ones would be the second place to look.