A team from the Katholieke Universiteit Leuven (Belgium) directed by professor Harco Willems has discovered a completely intact tomb dating to about 2050 BC at the site of Dayr al-Barsha in Middle Egypt. The burial was located in a rock cut shaft in the tomb of Uky in a vast necropolis on the southern hill of Dayr al-Barsha. This area has been under investigation since 2005 by Marleen De Meyer, who carried out the excavation of the tomb.
The tomb of Uky consists of two consecutive rooms,of which the shafts in the entrance chamber had already been excavated in 2005-2006. This year the two shafts in the rear chamber were the object of research. The fill of one of these shafts, a square one in the rear of the chamber, soon turned out to be entirely different than that of robbed shafts. It consisted of almost sterile limestone debris that formed the original backfill of a shaft after a burial had taken place in ancient times. Already on the second day a small hole emerged in the north wall of the shaft, and through it an entirely intact burial chamber could be seen. Even though the burial took place over four thousand years ago, the colours on the painted objects were very fresh, and no dust even covered them.
Late First Intermediate or very early Middle Kingdom. Lots of good photos of the contents at that link. It's not a big glourious chock-full-o-treasure tomb, but interesting.