The Visigothic Kingdom was a Western European power in the 5th to 8th centuries in Hispania, it used to be the most advanced kingdom in West Europe until musllims conquered it.
Muslim monuments as the Mosque of Cordoba and the Alhambra are worldwide known, specially by the push of muslimphile french and brit scholars from 19th and past century.
What many persons don´t know is that these buildings were built over Visigothic buildings.
Long time before Franks built the palatine palace of Aquisgran, visigoths ordered to built not only palaces using as model roman villas (something muslims cpied later in Alhambra) but entire basilicas and palatine cities such as Reccopolis following roman-byzantine urbanism and decorating them with rich frescoes and polychrome columns, as well as solar, christian, geometric and vegetal symbols.
None of these ruins survived to our days, muslims not happy with degrade the local population, also used the roman and visigothic monuments to build their own mosques and palaces on a massive Damnatio memoriae campaign against the most prosperous of early medieval kingdoms of Europe, stealing in the process many artistic motifs created by the visigoths such as the Horseshoe arch, roped shafts, polychrome columns, Pointed archs, etc. Motifs today linked to Islam but that originally were used by thee visigoths.
We must remember, all this was made in West Europe during dark ages peak (5th-8th centuries), Islam and semites were and are the racial enemies of europeans, no matter the type, latin, germanic, slavic, hellenic, etc. They are a plague in a world, a plague that must be cleaned from this world.