Rebellion of 1832, which was smaller in scale, but rendered famous by Victor Hugo's account in Les Misérables, the combat that ended the Paris Commune in May 1871, and the more symbolic structures created in May 1968. The barricade began its diffusion outside France in the 1780s and played a significant role in the Belgian Revolution of 1830, but it was only in the course of the upheaval of 1848 that it became truly international in scope. Its spread across the Continent was aided by the circulation of students, political refugees, and itinerant workers through the French capital, where many gained first-hand experience of one or another Parisian insurrection. The barricade had, by the middle of the nineteenth century, become the preeminent symbol of a revolutionary tradition that would ultimately spread worldwide. Barricade references appear in many colloquial expressions and are used, often metaphorically, in poems and songs celebrating radical social movements. Crowd control Barricades are used for crowd control applications at public events or during exceptionally busy shopping times. Different types of barricade are designed to fit the environment and use cases the organizer decides on. Bridge Feet Typically used for outdoor use, where the ground is not perfectly flat. The bridge design of the feet allows for better stability. Flat FeetUsed on surfaces such as streets, sidewalks, and tarmacs, these barricades are designed for use on flat surfaces. Heavy Duty Feet Similar to flat feet, but larger in size and made of heavy duty steel, allowing for more durability and support. Barricade Gates These gates swing open like a doorway, allowing for passage of people of goods through a run of barricades. Expanding Barricades Designed for indoor use and for use on sites where construction or work is occurring. Easy to move and store these barricades serve as a temporary barricade. Gallery See also The Barricades Bulwark Border barrier Rampart Ley Anti Barricadas Jersey barrier A las Barricadas ('To the Barricades') References Traffic signs Types of wall Fortifications by type