Where did the Buddha give his first sermon?

The Buddha delivered his first sermon in a deer park located in Sarnath, which is situated outside of Varanasi (Banaras).1

During this discourse, he addressed his five former companions, teaching them the middle way between self-indulgence and self-mortification, as well as the Four Noble Truths and the Eightfold Path. This event is traditionally described as the Buddha "setting the wheel of the dharma in motion," marking the beginning of his public teaching and the formation of the sangha.1