With the spread of Islam, and Mazin Bin Gadhubah joining Islam as the first person in Oman and his emigration to Medina to meet the Prophet, Peace be upon Him, the first mosque was built in Oman. This is Al Midhmar Mosque that still stands to this day in Wilayt Samail.

Because of the coastal location of Oman, the Omani navy occupied a leading position regionally. This sparked the ire of the Portuguese, who did not forget their devastating defeat. Fierce battles erupted between the Portuguese Navy (which had made India its base after the liberation of Oman) and the strong Omani navy. After a fierce battle, the Omani fleet was able to defeat the Portuguese fleet.

Oman had been the target of a number of attempts by the Persians to invade its territory, but the steadfastness and heroism of the Omanis were successfully combined to defeat the occupier. The invaders were defeated, underscoring the exploits of Omani heroes in defending their lands. This great victory was achieved at the hands of Imam Ahmed bin Saeed Al Busaidi, who defeated the Persians and was elected imam.

With the advent of 1970 came the dawn of a modern renaissance in the Sultanate, with the beginning of the prosperous era of His Majesty Sultan Qaboos bin Said, may God protect him.