The second painting you're talking about is the famous Las Meninas by Diego Velasquez one of the great works of the late renaissance, which arguably bridges the eras to modernism (cf. Manet) (painted in 1656)

There have been many (100s) of articles and books written about this painting, which has been called one of the great works in the history of European painting.

Additional info can be found here Las Meninas

If you are intrigued further, search out the analysis of the painting in the first 100 pages of The Order of Things by Michel Foucault. Be prepared for a tough read though - philosophy grad students can't make it through the text.

The Order of Things - read online