One of the first pieces generally considered Mannerist was created around 1525 to 1528 by the Italian painter .

Cannot to see image. no possible answer

Photography has changed its subject matter quite a lot over the past few years. in the 1800's, it was considered normal for families to have  post mortem photos of their loved ones, and now that would be completely unacceptable. i think that photographers have always pushed boundaries and have been eager to capture everything, it is just society that changes their boundaries.