Historically, Spain has been profoundly shaped by **Roman Catholicism**, which influenced its art, architecture, and festivals.
* **Catholicism:** While a majority of Spaniards still identify as Catholic, regular church attendance has declined significantly in recent decades, and the country has become highly secular in its laws and daily life. * **Religious Sites:** Spain is home to some of the world's most magnificent cathedrals, including the *Cathedral of Santiago de Compostela*, the *Seville Cathedral*, and the *Burgos Cathedral*. * **Minority Religions:** Due to recent immigration and demographic shifts, there are growing communities of Muslims, Protestants, and Orthodox Christians, alongside a small but historic Jewish community.