Archaeologists discovered several in china and consider them to be the oldest playable musical instruments.

Concerto grosso was composed during the classical era. (sorry if i misspelt the name)

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.