One of the “new” statues — its body weighing 250 tonnes — again depicts the pharaoh seated, hands resting on his knees.
It is 11.5 metres (38 feet) tall, with a base 1.5 metres high and 3.6 metres wide.
Archaeologists said with its now missing double crown, the original statue would have reached a height of 13.5 metres and weighed 450 tonnes.
The king is depicted wearing a royal pleated kilt held at the waist by a large belt decorated with zigzag lines.
– Well-preserved alabaster head –
Beside his right leg stands nearly a complete figure of Amenhotep III’s wife Tiye, wearing a large wig and a long tight-fitting dress.
A statue of queen mother Mutemwya, originally beside his left leg, is missing, archaeologists said.
The throne itself is decorated on each side with scenes from that era, showing the unification of Upper and Lower Egypt.
The second statue, of Amenhotep III standing, has been installed at the north gate of the temple.