That is a painting of Judith and her Maidservant. 1615 painting by the Italian baroque artist Artemisia Gentileschi. It hangs in the Pitti Palace, Florence.
The answer is Baroque music. This has been since 19th century in Western Europe. This might be strange in today's music. It is now called convenient catch-all and considered one of the diverse period.Hope this is the answer and would be of big help.
