A series of portraits by him of the Austrian archducal family was afterwards engraved. The Archducal Netherlands benefited from the Truce. On 24 July 1604, England, Spain and the Archducal Netherlands signed the Treaty of London. The main dome bears the imperial crown, and the smaller dome the archducal crown. This copy remained in the archducal collection, while several others were documented as gifts. On 24 July 1604 England, Spain and the Archducal Netherlands signed the Treaty of London. The archducal title was only officially recognized in 1453 by Emperor Frederick III. This archducal collection now forms the heart of Vienna's Kunsthistorisches Museum. The archducal hat of Tyrol is an insignia of the County of Tyrol. The archducal regime ensured the triumph of the Catholic Reformation in the Habsburg Netherlands. Meanwhile, the archducal regime ensured the triumph of the Catholic Reformation in the Habsburg Netherlands. Meanwhile, the archducal regime ensured the triumph of the Counter Reformation in the Habsburg Netherlands. The following year, he headed the archducal delegation that negotiated the Treaty of London.