El Jadida - Ibn Khaldun defines rent in his prolegomena (2005 edition) as revenue cumulated without producing effort not only by leasing property but also by commercializing natural resources or taxing their trade.

The Main Gate of Moulsy Idriss Mauseulom in Fez
The Main Gate of Moulay Idriss Mauseulom in Fez. Photo by MWN