Looking center for pointed and multi centered archs

Hospital Real. Granada
Looking for the construction of this pointed arch, we observed it has a low centres not down on the start line. This is due to the [b]rise of the arch compared with the ceiling[/b].[br][br]With GeoGebra we can proceed inversely in order to reconstruct the method for doing the arch.
Hospital Real. Pointed arch at main lobby
We can determine also the construction method for non cataloged arch such as the following [b]singular Ogee arch [/b]
Main Gate at Capilla Real
We can determine also the construction method for non cataloged arch such as the following [b]singular Ogee arch [/b]

Information: Looking center for pointed and multi centered archs