After defeating Montezuma's warriors and demanding that the Aztec nobles hand over their valuables, Cortés returned to Spain in 1528, bringing cocoa beans and chocolate drink making equipment with them. At this time, chocolate still only existed in the bitter drink invented by the Mayas. Sweet hot chocolate and bar chocolate were yet to be invented. After its introduction to Europe, the drink slowly gained popularity. The Imperial Court of Emperor Charles V soon adopted the drink, and what was then only known as "chocolate" became a fashionable drink popular with the Spanish upper class. Additionally, cocoa was given as a dowry when members of the Spanish Royal Family married other European aristocrats. At the time, chocolate was very expensive in Europe because the cocoa beans only grew in South America.