Braudel discussed the idea of long-term cycles in the capitalist economy that he saw developing in Europe in the 12th century. Particular cities, and later nation-states, follow each other sequentially as centers of these cycles: Venice in the 13th through the 15th centuries (1250–1510); Antwerp and Genoa in the 16th century (1500–1569 and 1557–1627, respectively), Amsterdam in the 16th through 18th centuries (1627–1733); and London (and England) in the 18th and 19th centuries (1733–1896). He used the word "structures" to denote a variety of social structures, such as organized behaviours, attitudes, and conventions, as well as physical structures and infrastructures. He argued that the structures established in Europe during the Middle Ages contributed to the successes of present-day European-based cultures. He attributed much of this to the long-standing independence of city-states, which, though later subjugated by larger geographic states, were not always completely suppressed—probably for reasons of utility.