What is a group of Archdukes called?

A group of archdukes is commonly called a House.

A collective noun for archdukes is an "assembly" of archdukes. The term "assembly" perfectly encapsulates the grandeur and exceptional significance associated with archdukes. As archdukes hold some of the highest ranks within the aristocracy, an assembly conveys the understanding that they come together for a common purpose, representing power, leadership, and prestige. Visualizing an assembly of archdukes conjures images of opulent gatherings, where dignified men bearing their noble titles and adorned with regal attire exchange knowledge, political strategies, and engage in discussions on matters of great importance. Being an assembly of archdukes implies a gathering that carries immense influence, where their shared expertise and diplomatic endeavors shape the course of history. In this poetic ensemble, archdukes emanate authority and embody a legacy of noble heritage, accompanied by an air of sophistication and refinement. The notion of an assembly of archdukes represents not only a group of esteemed aristocrats, but also a collective force of influential individuals orchestrate politics, champion cultural advancements, and navigate the intricate realms of international relations. Witnessing an assembly of archdukes brings to mind long tables adorned with fine silverware and sparkling crystal glasses filled with the finest wines and champagnes. This elite congregation encompasses an aura of exclusivity and excellence, characterized by intricate protocols, graceful demeanors, and captivating wit. However, it is crucial to acknowledge that an assembly of archdukes goes beyond decadence and indulgence, reflecting the responsibilities and challenges faced by those in positions of great power. These gatherings are often key occasions meant to shape or soften the currents of national and global events, where decisions impact both the lives of millions and the course of dynasties. As a collective noun, an assembly of archdukes remains a symbol of refined authority, naturally commanding attention, respect, and sparking wonder. In their gathering, the world witnesses a confluence of royal grace, strategic brilliance, and gradual navigation of shifting landscapes created by their unwavering presence.