Which deities were worshipped as protectors of doorways and crossroads in ancient Rome?

Lares are indeed recognized as deities associated with the protection of doorways and crossroads in ancient Roman religion. These household gods were believed to guard the home and family, often receiving offerings and worship from individuals to ensure safety and prosperity. They were typically represented in shrines known as lararia, which could be found in Roman households.

In the context of their role, Lares were seen as protectors of specific places, including entrances and junctions, which were regarded as significant points in both the physical and spiritual realms. Their importance in safeguarding these transitional spaces reflects broader Roman beliefs about the influence of divine forces in everyday life.

The other options represent different aspects of Roman religious belief. Penates were associated with the pantry and the protection of the household's food supply rather than doorways. Numina refer to divine powers or spirits that influence all aspects of Roman life rather than specific locations like doorways. Caelum, meaning heaven or sky, does not relate directly to protective deities of doorways or crossroads. Thus, Lares accurately fits the role of guardians in these sacred spaces.