Catholic culture is an elusive term. It is -- by definition -- the most nuanced, most diverse, most complex culture on the planet. Catholics practice their faith freely in some areas and underground in others. They're among the poor and the rich. Indian Catholics are completely different from American Catholics. In fact, Filipino Catholics have different customs than Mexican Catholics, and they both have Spanish roots. It’s all different, yet they’re all Catholic.
So how do you define Catholic culture? The vagueness of the term only becomes vaguer without something concrete exemplifying it. In medieval times, there was something concrete: the large village centered around a parish, guilds, a market and maybe a monastery. It emerged because it was already surrounded by a Catholic society that integrated Catholic values into the lifestyle of the people. The Catholic villages of Europe were a decent embodiment of Catholic culture.