The Bab, Herald of the Baha'i Faith
For Baha’is, the Shrine of the Bab is the second holiest place on earth after the shrine of Baha'u'llah in Akka, and it is a place of quiet prayer and meditation where Baha’i pilgrims and visitors from around the world can come and pay their respects. Link
He was the Forerunner of One yet more mighty than Himself… And as John the Baptist had been the Herald or Gate of the Christ, so was the Bab the Herald or Gate of Baha’u’llah.
The Bab’s teachings, which opened the gate and prepared the way for the global spread of the Baha’i teachings, encouraged all humanity to unite under the banner of one universal Faith:
Become as true brethren in the one and indivisible religion of God, free from distinction, for verily God desireth that your hearts should become mirrors unto your brethren in the Faith, so that ye find yourselves reflected in them, and they in you. This is the true Path of God, the Almighty, and He is indeed watchful over your actions.
Selection from the Writings of the Bab, p.55
The prophet founder of the Baha'i Faith was exiled with His family and some followers to the Ottoman penal colony that is now the Israeli city of Akko (Acre). Link