Bosnia y Herzegovina alberga miles de misteriosas lápidas medievales

Filippo Brunelleschi's experiments and Leon Battista Alberti's 1435 treatise gave painters a method for creating realistic depth on a flat surface.

Found in Austria in 1908, the small limestone figure is one of the best-known prehistoric artworks.

Despite producing around 2,000 works, Van Gogh gained little recognition before his death in 1890.

Vincenzo Peruggia took the painting, and it was missing for more than two years. The theft made the portrait far more famous.