When I was 16, my first vacation to Europe surprised me. But at the end of the trip for a long time to stay with me rather than the Eiffel Tower, Buckingham Palace or canals of Venice, but ordinary aspects of life: the locals take for granted the things: road marking and the color of the logo, posters, a local snack food in the shop window, and the place of the sound and the smell of the most important.
Spectators at the Roman Colosseum enjoyed an enormous number of varied shows: from gladiator fights to live animal hunts with exotic animals. And, of course, at a later period, Christians were killed in the Christian persecutions by a variety of methods including being torn apart by wild animals.
But the Roman people were somewhat delicate and found the scent of blood unpleasant so the Colosseum had a very clever trick for helping out. Above the heads of the paying guests was an awning (called the velarium), the purpose of which was to protect people from the harsh sun and to keep off the rain should any fall. Additionally, cleverly concealed tubes would continually spray perfumed water over the awning in order to partly minimize the odor of death, but also to moisten the heads of the spectators and keep them cool. These were supplemented by fountains in the form of statues which also issued forth fragrant water. The primary ingredients in the perfume were saffron, and verbena which, just recently, was outlawed by the European Union for use in any human skin contact products.