The most recognizably "Moroccan" architecture, however, is the traditional architecture that developed in the Islamic period (7th century and after) which dominates much of Morocco's documented history and its existing heritage. This "Islamic architecture" of Morocco was part of a wider cultural and artistic complex, often referred to as "Moorish" art, which characterized Morocco, al-Andalus (Muslim Spain and Portugal), and parts of Algeria and even Tunisia. It blended influences from Berber culture in North Africa, pre-Islamic Spain (Roman, Byzantine, and Visigothic), and contemporary artistic currents in the Islamic Middle East to elaborate a unique style over centuries with recognizable features such as the "Moorish" arch, "riad" gardens (courtyard gardens with a symmetrical four-part division), and elaborate geometric and arabesque motifs in wood, stucco, and tilework (notably "zellij").