Colour coding: a green layer over edifices on which a monograph or an in-depth article has been published. A dotted green line around edifices mentioned in those texts as part of the compound being discussed..

The small multiples visualisation is here used to help comparing the overall amount of transformations with the number of definite transformations (i.e. corroborated by enough trustworthy documents and/or testimonies). The more vertical the left side of the yellow triangle is, the more these numbers coincide – if the triangle’s side is vertical (as in Fig. 28), all of its transformations are considered as certain.

Once this is said, spotting group behaviours becomes straightforward: edifices built of brick and stone (lines 1 and 2) are obviously more (surface of the triangle) and better (verticality of the left side) documented.