Why does the greek god Janus have two heads?

The Roman god Janus is often depicted with two heads, looking in opposite directions. This is because he is the god of beginnings and endings, of transitions and new beginnings. He is often shown with one face looking back to the past and the other looking forward to the future.

Janus is also associated with doors, gates, and doorways, as he is the god who guards the entrances to new places and new journeys. He is also associated with keys, which are used to open doors and unlock new opportunities.

In Roman mythology, Janus was an important god who was often invoked at the beginning of new undertakings, such as the start of a journey or the beginning of a new year. He was also worshipped at the end of the year, as a way to thank him for his protection and guidance during the past year.