The highest point in Hattusa - that is the artificial embankment of Yerkapı - is an excellent vantage point of the Upper Town of Hattusa. On the left side, you can see the fortifications of the city, ascending from the Lion Gate to Yerkapı, and stretching further to the east, to the King's Gate. Yerkapı embankment stands in the middle of the arc demarcated by the city walls. If you look northwards at the city from the Sphinx Gate, you can see a wide valley in the foreground, bordered by Sarıkale and Yenicekale to the west and the modern road to the east. In the valley, you can see numerous building plans that were originally just temples.

The sparse finds in the temple rooms do not allow any conclusions to be drawn as to which gods they were dedicated to. As no clear identification of the deities worshipped in these temples has been made, the archaeologists gave them numbers for easier identification. So far, 24 temples have been excavated in the central area of the Upper Town, plus Temple 30 at the Lion Gate, Temple 7 on the eastern slope of Sarıkale. There are also three slightly off-site Temples 3, 2, and 5, situated to the east towards the King's Gate.

Their sizes vary greatly, between 400 and 1500 square metres, but their structure is similar. They were erected on wooden frames and filled with sun-dried bricks that stood on a stone foundation. The roofs were flat. This technology is characteristic of the Hittite architecture. In all of them, you enter an open courtyard through a gate with side rooms, on the (usually opposite) side of which a portico leads into the Adyton, the Holy of Holies.

There, on a pedestal, stood a statue of the respective deity being worshipped. The statues were made entirely of metal or from a combination of metal and wood. Interestingly, archaeologists have failed to find a single one of them. Hittite records attest their existence. Other rooms of the temples served as warehouses and housing for priests. Moreover, the courtyard of the Temple 3 was decorated with statues of lions, which are now exhibited at the Museum in Boğazkale.

Some of the temples (4, 6, 26, and 5) are surrounded by a temenos, i.e. a holy district, that was bordered by a wall. The largest temple is Temple 5, which is located a little off to the east of the actual quarter in the immediate vicinity of the King's Gate. It is distinguished by the size and the layout - different from other temples. Its dimensions are 60 to 60 meters, almost the size of the Grand Temple, which also has the similar plan and the layout of the inner sanctuary. Temple 5 was built on the plan of a double temple, as it was dedicated to two deities. Moreover, like the Grand Temple, has two holy of holies as well as a small altar-like structure in one corner of the central courtyard.

Near the ruins of the Temple 5, the remains of the outbuildings were discovered. It is believed that Hittite kings rested there during religious ceremonies. A particularly exciting discovery from these buildings is a relief depicting King Tudhaliya in warrior's clothing. It shows the ruler holding a spear in his right hand, dressed in a short tunic and a helmet with horns. The presence of horns means that the ruler died and became a god. However, there is no indication as to which of the great kings of that name might be meant. Currently, this relief is a part of the exhibition at the Museum of Çorum.

The impressive number of the temples excavated in Hattusa testifies to the numerous gods of the Hittite pantheon. Hittite texts speak of the thousand gods of the Hatti land. This is also related to the fact that the Hittites brought the local deities, including their images, from all newly conquered countries or cities and integrated them into their religion. It is assumed that other temples existed in the Upper City.

Research over the last few decades has shown that, contrary to previous opinions, at least some of the temples were built as early as the 16th century BCE. Andreas Müller-Karpe bases his findings on comparisons with temples in Kuşaklı, which could be dated using dendrochronology. At the end of the 13th century BCE, residents who had previously lived outside the city retreated behind the walls, probably due to external threats.

Large parts of the temple quarter were built over with residential buildings and, above all, workshops. In the southern part of the quarter, irregular floor plans of these buildings can be seen. These changes might date back to the relocation of the capital under Muwatalli II at the beginning of the 13th century BCE.

After the Hittite Empire had collapsed, more houses and workshops were built in the District of Temples. For instance, in the second half of the 10th century CE, a village consisting of over twenty houses and a monastery with a surrounding cemetery was built above the temple quarter, which was hastily abandoned at the end of the 11th century. In the northern part of the temple quarter, the remains of a Byzantine church can be seen.