Certain rites and traditions, such as singing of birthday songs, associated with birthday cakes are common to many Western cultures. The Western tradition of adding lit candles to the top of a birthday cake originates in 18th-century Germany. However, the intertwining of cakes and birthday celebrations stretches back to the ancient Romans. The development of the birthday cake has followed the development of culinary and confectionery advancement. While throughout most of Western history, these elaborate cakes in general were the privilege of the wealthy, birthday cakes are nowadays common to most Western birthday celebrations. Around the world many variations of the birthday cake, or rather the birthday pastry and sweets, exist. There is no universal rule about the shape and color of a birthday cake – in recent years for example cakes take the form of animals or have high-quality drawings on them in order to fit the party theme.