Hoftag
A Hoftag was the name given to an informal and irregular assembly convened by the King of the Romans, the Holy Roman Emperor or one of the Princes of the Empire, with selected chief princes within the Empire. Early scholarship also refers to these meetings as imperial diets, even though these gatherings were not really about the empire in general, but with matters concerning their individual rulers. In fact, the legal institution of the imperial diet appeared much later.
From the feudal obligation of chief princes to stand by the king's side in word and deed, a consequent duty was derived by the time of the High Middle Ages to appear in person, at the request of the king, at royal assemblies in order to offer counsel and participate in decision-making. This was the so-called court attendance duty. The Hoftag differed from the usual counsel meetings of the royal court essentially only in the additional participation of those invited. These could be princes, members of the nobility, prelates or representatives of foreign powers. From the 13th century, representatives of the free imperial cities were also invited to Hoftage. The assemblies were organised along the lines of a royal court meeting and were firmly focussed on the king.