The spot here mentioned was at the back of the Temple of Venus Myrtia (the myrtle Venus), on Mount Aventine in Rome.

Apuleius, Book vi.

That is, “The troop of gladiators of the ædil will fight on the 31st of May. There will be fights with wild animals, and an awning to keep off the sun.” Wind and weather permitting, there were awnings over the heads of the spectators; but, generally, there appears to have been too much wind in this breezy summer retreat to admit of this luxury. “Nam ventus populo vela negare solet,” says Martial, and the same idea occurs in three other places in this poet’s works (vi. 9; xi. 21; xiv. 29). Sometimes, also, the bills of gladiators promise sparsiones, which consisted in certain sprinklings of water perfumed with saffron or other odours; and, as they produced what was called a nimbus, or cloud, the perfumes were probably dispersed over the audience in drops by means of pipes or spouts, or, perhaps, by some kind of rude engine.