KV3 Son of Rameses III

Tomb KV3, located in Egypt's Valley of the Kings, was intended for the burial of an unidentified son of Pharaoh Ramesses III during the early part of the Twentieth Dynasty. It is similar in design to the "straight axis" tombs typical of this dynasty, and an ostracon written in hieratic script from the time of Ramesses III mentions the founding of a tomb for a royal prince, likely this tomb. The unfinished state of a couple of rooms in the tomb along with scant archeological evidence suggests that the tomb was never used. Some have suggested that it was originally intended for use by the prince regent who would succeed as Ramesses IV, and who started building his own tomb soon after he came to the throne.

Source: Wikipedia