Twenty years after his father had done so, Idris II refounded the city Fez on the left bank of the River Fez, opposite to where his father had founded it on the right bank.
Dua puluh tahun setelah ayahnya meninggal, Idris II kembali ke kota Fez di tepi sebelah kiri sungai Fez, berlawanan di mana ayahnya telah didirikan di tepi sebelah kanan.