Your question is too vague to answer, but the related link below will explain all about cathedral architectures.
The Cathedral in Paris is called the Notre Dame Cathedral.
The Cathedral in question is Notre Dame Cathedral.
Projection towers on castles are called a Buttress.
Well, the cathedral next to Hyde Park in Sydney is called Saint Mary's Cathedral.
If you have a projection on your skull, something that might relate is a swelling of the tissues of the skull due to a blow from a dull object. The projection on the Occipital Bone is called the Inion.
It is called a talon
A projection
Seville Cathedral, aka The Cathedral of Saint Mary of the Sea.
Chapter
Parallel projection does not produces realistic views whereas perspective projection produces realistic viewin parallel projection lines of projection are parallel whereas in perspective projection lines are not parallel and the point where these lines meets is called ceter of projection in case of perspective projection
That's true of the Mercator projection, among others.
Projection