Who began the building of the Great Hypostyle Hall at Karnak?

Thothmes I

The Great Hypostyle Hall of Karnak, located within the Karnak temple complex, in the Precinct of Amon-Re, is one of the most visited monuments of Ancient Egypt. The design was initially instituted by Hatshepsut, at the North-west chapel to Amun in the upper terrace of Deir el-Bahri The hall covers an area of 50,000 sq ft (5,000 m2). The roof, now fallen, was supported by 134 columns in 16 rows; the 2 middle rows are higher than the others (being 33 feet (10 m) in circumference and 80 feet (24 m) high). The hall was not begun by Horemheb, or Amenhotep III as earlier scholars had thought but was built entirely by Seti I who inscribed the northern wing of the hall with inscriptions.[citation needed] Decoration of the southern wing was completed by Ramesses II. A series of later pharaohs added inscriptions to the walls and the columns in places their predecessors had left blank, including Ramesses III, Ramesses IV and Ramesses VI. The north side of the hall is decorated in raised relief, and was mainly Seti Is work. The southern side of the hall was completed by Ramesses II, in sunk relief although he used raised relief at the very beginning of his reign before changing to the sunk relief style and re-editing his own raised reliefs there. Ramesses II also usurped decoration of his father along the main north-south and east-west processional ways of the hall, giving the casual observer the idea that he was responsible for the building. Most of Seti Is reliefs in the northern part of the hall were respected however. The outer walls depict scenes of battle, Seti I on the north and Ramesses II on the south. Although these reliefs had religious and ideological functions, they are important records of the wars of these kings. On another wall adjoining the south wall of the Hall is a record of Ramesses IIs peace treaty with the Hittites that he signed in Year 21 of his reign.