Islam entered Samarkand in the 8th century, during the invasion of the Arabs in Central Asia (Umayyad Caliphate). Before that, almost all inhabitants of Samarqand were Zoroastrians, and many Nestorians and Buddhists also lived in the city. From that point forward, throughout the reigns of many Muslim governing powers, numerous mosques, madrasahs, minarets, [shrine]s, and mausoleums were built in the city. Many have been preserved. For example, there is of Imam Bukhari, an Islamic scholar who authored the hadith collection known as "Sahih al-Bukhari", which Sunni Muslims regard as one of the most authentic ("sahih") hadith collections. His other books included "Al-Adab al-Mufrad". Samarkand is also home to of Imam Maturidi, the founder of Maturidism and the , who is revered in Islam, Judaism, and Christianity.