The model of the modern, public zoo became popular in 18th century, during the Age of Enlightenment. The Age of Enlightenment was a period in European history when science, reason, and logic were promoted as ideals of society and government. During this time, people started wanting to study animals for scientific reasons. Scientists wanted to research animal behavior and anatomy. The first modern zoo, built in 1793, opened in Paris, France. The menageries of French aristrocrats, including the king and queen, were taken by leaders of the French Revolution and relocated to the Ménagerie du Jardin des Plantes. Today, zoos are meant to entertain and educate the public but have a strong emphasis on scientific research and species conservation.