Pierre Guichard (5 November 1939 – 6 April 2021) was a French historian, archeologist, medievalist, and academic.
A professor of history at Lumière University Lyon 2, Guichard directed the Centre interuniversitaire d'histoire et d'archéologie médiévales from 1994 to 2003.
[4] In the years 1976–1977, historian Pierre Guichard challenged the notion that Arab and Berber invasions after 711 AD did not have much demographic and sociopolitical impact.
The practice of endogamy overall prevented assimilation between Arab clans and the local civilians, as intermarriage did not happen.
Thirdly, the massive influx of Arab and Berber Muslims throughout the first two to three centuries following the invasions allowed for these ethnic groups to be the majority demographic in the Iberian Peninsula.