Not all churches with "basilica" in their title actually have the ecclesiastical status, which can lead to confusion, since it is also an architectural term for a church-building style.
In the 18th century, the term took on a canonical sense, unrelated to this architectural style.
By canon law no Catholic church can be honoured with the title of basilica unless by apostolic grant or from immemorial custom.
As of November 2019[update], there were 1,690 basilicas (four of them major; the rest minor) in the world.
The following churches are often referred to as basilicas, but there does not appear to be evidence of their officially holding that status: