El Tarif is the farthest north of the "Tombs of the Nobles", and contains tombs of the 11th Dynasty (late First Intermediate Period and early Middle Kingdom). These are large structures with courts hewn from the rock. The row of simulated pillars along their rear facades has led them to be called saff tombs (from Arabic saff, "row"). The rooms in the interior are small and the decoration (where it has been preserved) modest. The best preserved are the tombs of Kings Antef I, II and III of the 11th dynasty.
Adapted from Wikipedia