it added perimeter buildings to house pilgrims
pilgrimage churches, Romanesque style churches built along pilgrimage routes.
Pilgrimage churches were build following the Romanesque-cross plan containing two arms.
A pilgrimage church is typically shaped like a cross, but the shapes can vary. Pilgrimage churches are frequently located by the graves of saints and are usually built where a miracle had taken place.
Romanesque, basilica
to accommodate the rising # of visitors
People visiting pilgrimage churches often wanted to walk around the church and observe the architecture. After walking down one side aisle, they would walk in front of the altar to amble down the other side aisle. Oftentimes this was disruptive to an ongoing church service. Ambulatories provide a pathway around the back of the altar for visitors to walk across covertly. Pilgrimage churches usually implemented this design to accommodated the large influx of people they anticipated would be walking through the church.
Lalibela, the greatest of the Zagwe kings, returned from pilgrimage in Jerusalem and ordered the construction of the great rock churches of Lasta. He was determined to recreate a 'Zion' in Ethiopia.
Charles Hume has written: 'Papers in connection with a plan for removing some of the City churches to places within the metropolitan district, where church accommodation is required'
Frederick A. Bisbee has written: 'Why I am a Universalist' -- subject(s): Doctrines, Universalism, Universalist churches 'A California pilgrimage' -- subject(s): Accessible book, Description and travel
Yes, there is a church built in the grotto of Massabielle in Lourdes, France. It is called the Sanctuary of Our Lady of Lourdes, and it is a popular pilgrimage site for Catholics around the world.
There are dozens, if not hundreds of pilgrimage sites worldwide. Some, like the Vatican, are extremely well-known. Others, like local churches and shrines would probably be considered the "least" although, certainly not by those that live there. See the link below for some pilgrimage sites.
No, some people still go on personal pilgrimages. There are some churches who go to places as a group because it represents the major holy place for their religion. Muslims go to Mecca as a pilgrimage.