Thus, the emergence of red brick in the region around León as the material of choice in the construction, not only of regular homes but also of official and even religious buildings owed less to taste than to necessity. Similarly, the development of adobe as a viable building material shaped the landscape of the countryside indelibly, much in the same way as the tendencies arrived from the Frankish counties on the other side of the Pyrenees spread from coast to coast and ultimately determined the triumph of Romanesque architecture.