Gabriel the Archangel told Muhhammad that he is God's prophet and there is only one god.
Islam
Muhammad started teaching Islam religion in the year of 610 A.D
Muhammad.
Islam
The religion taught by Muhammad is called, Islam, which means submission to the will of God. A follower of Islam is a Muslim.
The start of Islam is marked in the year 610, following the first revelation to the prophet Muhammad at the age of 40. Muhammad and his followers spread the teachings of Islam throughout the Arabian peninsula.
The leader of Islam is prophet Muhammad (peace be upon him) and started in Mecca (or Makkah) in Saudi Arabia.
Islam is a religion per God revelation of Quran to prophet Muhammad (PBUH). Followers of Islam are called Muslims. No Muslim worship Islam or Muhammad.
Islam !!
In Arabia, in 610 when the last Prophet of Islam Hazrat Muhammad Mustafa (SAW) started preaching Islam to the people.
Islam in its universal sense began by beginning of universe creation. However, Islam religion per God revelation of quran to prophet Muhammad (PBUH) began in Mecca (or Makkah) in Saudi Arabia. Imailism is what the religion is called, and i am sure it began in islam.
Initially, Muhammad began teaching the principles of Islam in Makkah, confined only to the people very close in his social circle.