Lorenzo Magalotti was an Italian philosopher, diplomat, author and poet who in 1674 was sent on a mission to Sweden by Cosimo III, Great Duke of Florence. His impressions of Sweden, Notizie di Svezia, which is kept as a manuscript in Florence was translated to Swedish and printed in 1912.
He did not only write, but also made drawings from his travels (Sweden wasn't the only one) and the "book" on Sweden has 21 such. This one, from Wikimedia Commons, show a sauna with bath attendants.
And all these images can be seen on Uppsala University Library's web site, here.