Original sentence: On July 19 there was a formal ceromony for all at the Ducal Palace of Colorno where Ferdinand had been born.The decision of who his future spouse would be, was sealed by his mother's close correspondance with the powerfull Empress Maria Theresa of Austria who had promised Ferdinands parents the throne of the Netherlands, which had been returned to Austrian rule under the Treaty of Aix-la-Chapelle
Edited sentence: On July 19 there was a formal ceremony for all at the Ducal Palace of Colorno where Ferdinand had been born.The decision of who his future spouse would be, was sealed by his mother's close correspondence with the powerful Empress Maria Theresa of Austria who had promised Ferdinands parents the throne of the Netherlands, which had been returned to Austrian rule under the Treaty of Aix-la-Chapelle