The celebrated friendship between Theseus and Pirithous is said to have been begun as follows: The fame of the strength and valor of Theseus being spread through Greece, Pirithous was desirous to make a trial and proof of it himself, and to this end seized a herd of oxen which belonged to Theseus, and was driving them away from Marathon, and, when news was brought that Theseus pursued him in arms, he did not fly, but turned back and went to meet him. But as soon as they had viewed one another, each so admired the gracefulness and beauty, and was seized with such a respect for the courage of the other, that they forgot all thoughts of fighting; and Pirithous, first stretching out his hand to Theseus, bade him be judge in this case himself, and promised to submit willingly to any penalty he should impose. But Theseus not only forgave him all, but entreated him to be his friend and brother in arms; and they ratified their friendship by oaths. After this Pirithous married Deidamia, and invited Theseus to the wedding, entreating him to come and see his country, and make acquaintance with the Lapithae; he had at the same time invited the Centaurs to the feast, who, growing hot with wine and beginning to be insolent and wild, the Lapithae took immediate revenge upon them, slaying many of them upon the place, and afterwards, having overcome them in battle, drove the whole race of them out of their country, Theseus all along taking the part of the Lapithae, and fighting on their side.