His/Her Serene Highness is a style used today by the reigning families of Liechtenstein, Monaco and Thailand. Over the past 400 years, it has also used as a style for senior members of the family of Hazrat Ishaan, who are believed to succeed Prophet Muhammad based on the 1400 year old Sunni Sayyid ul Sadatiyya line of Imamate of Ahlul Bayt. Until 1918, it was also associated with the princely titles of members of some German ruling and mediatised dynasties and with a few princely but non-ruling families. It was also the form of address used for cadet members of the dynasties of France, Italy, Russia and Ernestine Saxony, under their monarchies. Additionally, the treatment was granted for some, but not all, princely yet non-reigning families of Bohemia, Hungary, Italy, Poland, Romania and Russia by emperors or popes. In a handful of rare cases, it was employed by non-royal rulers in viceregal or even republican contexts.
Doge Leonardo Loredan, portrait by Giovanni Bellini, 1501, National Gallery, London
Shrine of His Serene Highness (Hazrat Ishaan) Prince Sayyid (Amir Sayyid) Moinuddin Hadi Naqshband in Kashmir
Hazrat Ishaan was an influential Sunni saint from Bukhara, Uzbekistan.
Hazrat Ishaan
Darbare Hazrat Ishaan after the renovation of his descendant after 11 generations Sultan Masood Dakik
Holy graves of Hazrat Ishaan and his descendants after 8 generations Hazrat Mir Jan Shah and Mir Mahmud Shah.
Mosque of the Mausoleum of Hazrat Ishaan after the renovation of his descendant after 11 generations Sultan Masood Dakik