Understanding art

Usually museums aren’t my thing because I’ve a hard time understanding art pieces. However, I am currently enrolled in Art History class which means that I have to look at artworks a a lot. My art history professor thoroughly explains the culture and the time period of the art works he uses for his class. After being in the class, I was eager to learn even more about the art from the past and what they actually depict. I’ve finally found a reason to go to museums and thoroughly analyze the details of sculptures and paintings. This specific sculpture caught my attention because it has no arms and has three heads. I want to be able to understand why it was made such way. Hopefully my professor can tell me more about it.