A visit to this complex is like reviving the Egyptian empire history. Through the centuries new temples and pylons were added to the existing ones. Looking at this monuments you can see the fluctuating fortunes of Ancient Egypt.
The main temple goes from West to East. More than 10 pylons separated the temple's main halls. The ones in the temple's walls, are numbered from one (most recent) to six. And the ones in the perpendicular axle from seven to ten.
If I am not wrong the one you can see in the photo is pylon number eight, and was erected by queen Hatshepsut. Number seven was erected by Thutmose III. The 9th and 10th pylons were built during Horemheb's reign (1319–1292).