Ukrainian culture has a rich history of music, dance, and literature. Music spans many genres from traditional folk to classical and modern rock, incorporating elements from Ukrainian folk traditions. Dances also show influences from polka to ballet. Literature dates back to the 11th century, though it declined after the Mongol invasion; it regained prominence in the 14th century. A significant art form is the decorated Easter egg, called Pysanky, whose wax-resist dyeing technique to create colorful patterns is thousands of years old and predates Christianity in Ukraine.