[defrost]

Placement is an interesting problem, assuming a plan to lay them out in a "line", either Geodesic (tricky) or on a common projection of the period prior to construction there remains a few questions:

Given a preferred predetermined position, navigating to the desired latitude would have been easy enough for the time, getting to a spot with the correct longitude is a tricky feat prior to accurate clocks.

Having found such a location there's no apriori guarantee that site is ideal for a large stone building which would lead to some fudging about to find a near althernative site along a corridor.

There's some work to be done upon the order in which these buildings went up and on the locations themselves; for example:

https://en.wikipedia.org/wiki/St_Michael's_Mount

dates as a monastic site back to the 8th Century or so and has very little (almost none) play in position .. it's situated on a rocky outcrop in a strong tidal zone.

All of which leaves questions such as when a decision might first have been made to infill later buildings to match a line through which earlier buildings on which projection.