This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Francesco Saverio Mergolo Design for Painted Ceiling Google Art Project. Francesco Saverio Mergolo Francesco Saverio Mergolo CooperHewitt National Design Museum cooperhewitt org PM Brush and black wash black chalk on paper Giovanni Piancastelli collection purchased from Mrs Edward Brandegee False AM