What is the name of the secret center that the Prophet (peace and blessings be upon him) took as a starting point for his call in its early stages?

In the early days of his call, the Prophet, peace and blessings be upon him, invited people to Allah secretly for fear of harm, until the noble verse was revealed: "Therefore, proclaim openly what you are commanded and turn away from the polytheists." (15:94) Then he openly declared the call. The house of Al-Arqam ibn Abi Al-Arqam was a center where the Prophet met with the believers to teach them the religion away from the eyes of the polytheists. The Companions used to conceal their Islam, their worship, and their call. Many of the early Companions embraced Islam before the Prophet entered the house of Al-Arqam, while others embraced Islam there, such as Suhayb. This house was the first Islamic dawah center from which the call originated.