This is a semi-circular building, located on the lower part of a hill, where houses of the high level people are located.
At the Temple of the Sun, you’ll find a fountain, water coming out of the stone structure.
Recently, archaeologists have pointed out to the importance of this building in the complex, they believe it is an astronomical observatory.
The Sun Temple’s exact reason for building remains unknown, this means that we don’t know what gods were worshiped or what activities actually took place in it. According to some scientists, the worshiped deity could have been Wiracocha, the supreme god of the Incas. But this is just an assumption.
The Temple of the Sun is a remarkable creation, but here you will notice stones that are held together by mud, not just “stale” constructions (because, as we know, in general, the Incas did not use any sort of mortar to stick the stones together).
You will find many images of this building, it is one of the most unique structures within the complex, perhaps because it is the only round one, the construction must have been very difficult.