Gallery of 1,000 Images
 
These photos are the best of the PhotoTree collection. If image date is noted as "(Documented)", this image included a date notation on the image or other evidence such as a cancelled tax stamp or studio date. Otherwise, the image date as been 'estimated' using techniques developed by PhotoTree.com.
 

What kind of photographic is this?

The major types or formats of photographs in the 19th century appeared and then went out of favor at specific times in the 1800s. So, the first step in narrowing the possible date for your old photograph is to determine what type is is.