A good example is that of the statue of Amenemhat (Amenemh) Ill.
And Amenemh III.
And Amenemh III., the succession of strong kings appears to have centralized all authority very completely.
Amenemh I., the first king, whose connection with the previous dynasty is not known, reigned for thirty years, ten of them being in partnership with his son Senwosri I.
The Instructions of Amenemh to his son Senwosri, whether really his own or a later composition, refer to these things.
Amenemh IV.s reign was short, and the dynasty ended with a queen.