Bey al-Mahalla meaning Bey of the Camp, was a title for the heir apparent to throne of the Beylik of Tunis

Tunisia

Tunisia , officially the Tunisian RepublicThe long name of Tunisia in other languages used in the country is: , is the northernmost country in Africa. It is a Maghreb country and is bordered by Algeria to the west, Libya to the southeast, and the Mediterranean Sea to the north and east. Its area...

. The title was given to the most senior member of the Beylical family after the reigning Bey. The title came the style of Highness

Highness

Highness, often used with a possessive adjective , is an attribute referring to the rank of the dynasty in an address...

. The last person to carry this title was Prince Husain Bey, Bey al-Mahalla

Husain Bey, Crown Prince of Tunisia

Husain Bey Gouta, Crown Prince of Tunisia was the titular head of the Husainid Dynasty. He was the third son of Muhammad V an-Nasir, Bey of Tunis, by his second wife, Lalla Husn ul-Ujud, from 1906 until 1922.-Biography:...

, heir apparent to Tunisia from 1955 until the abolition of the monarchy in 1957. From Tunisia's independence on March 20, 1956 he was given the new title of Crown Prince.