الأزمات السياسية والأوبئة والآفات ببجاية خلال العصر الوسيط

Béjaïa as the other Islamic cities know many natural catastrophes, and politic problems, all these problems and catastrophes had social economic, and cultural results and these results are negative and positive like : - the scientific researches especially in medicals for example : new medicines for very dangerous illnesses and diseases.