Strong kingdoms are built on structure long before they are decorated. Editor’s Note: This article is an expanded and substantially revised edition of an article originally published on RandomThoughtsInTraffic.com. While the original introduced semantic HTML as an important front-end development practice, this StackNScroll edition explores the subject through the broader disciplines of software architecture, browser interpretation, accessibility, maintainability, and long-term engineering thinking. New material examines how browsers parse documents before rendering interfaces, why semantic HTML influences every layer of the modern web stack, and how experienced engineers gradually learn to think differently about markup after years of maintaining production software. As part of this week’s Foundations of the Realm theme,…