The temple of Karnak is considered to be the most impressive monument in Egypt after the pyramids of Giza.
Most of the elements in Karnak Temples were constructed by Kings of the New Kingdom but in fact the history of building this temple dates back to the old kingdom. This temple is considered to be like a book that all kings of Egypt were trying to record their names on it. The golden age of Luxor "Thebes" was in the new Kingdom and it was also the Golden age of Karnak. Most kings of the 18th dynasty, particularly, considered Amon Ra as God of war, consequently, the best way to be in power and to bring victories is to be close to that God by giving sacrifices, setup a new pylon or to add a collection of columns.
Structure of any temple in the new Kingdom, simply, is a pylon followed by a court, then a Hypostyle at its end lies the Sanctuary “Holy of the holies".
Amun-Ra with the rise of Thebes royal line become the supreme God of the whole Kingdom, with the other 2 members of his triad, his consurt Mut and his son ,the God of the moon, Khonsu.
Architecturally, it's a great mixture of all types and times and historically is considered a document in stones in which all Egyptian history with all it’s up &down can be traced more or less distinctly for a period of time over 2000 years.