If there is no clear title to the image, a popular title may be used if one exists. If a popular title to the image does not exist then you will need to supply the image with a title, in square brackets, proving the following where possible
The subject matter.
The name or place of the object depicted, . the person, the building, the location etc.
If the year the image was taken is not available but can be established, then use this as your date.
If the exact date is not known, an approximate date followed by a question mark (?), or preceded by "ca." should be used, this should be given in square brackets .
If no date, or approximate date can be found then you would use [no date].