I've been aware of the ratios - I think they were presented at the conference - but clearly his new fans were not from the response ... and that's why I welcome questions, because sometimes I forget to tell people things, and ... Amphipolis, as Katerina Peristeri has emphasised, is universal and of interest to everyone.
So yes, the Lion's height was in proportion to the diameter of the round wall.
And if the walls of ancient Alexandria were 15,840 m then these would have been 100 times the circumferance of the walls of the tomb at Amphipolis ...
Alexandria was founded by Alexander the Great, and his chief architect was Deinocrates; Deinocrates was responsible for the plan of Alexandria, presumably including the walls (Vitruvius II Praef), as well as the funeral pyre for Hephaestion.
Much of Alexandria was destroyed by an earthquake, and the city was continuously inhabited for centuries, so little of the city has been found. Alexandria became one of the largest cities in the world, so the assumption is that as the population increased, so did the walls - this need not be the case, as Rome's walls were not rebuilt between the reigns of Augustus and Aurelian.
In the mid 1st century BC Diodorus Siculus (17.52) wrote:
Alexander also laid out the walls so that they were at once exceedingly large and marvelously strong. Lying between a great marsh and the sea, it affords by land only two approaches, both narrow and very easily blocked.
In shape, it is similar to a chlamys, and it is approximately bisected by an avenue remarkable for its size and beauty. From gate to gate it runs a distance of forty furlongs; it is a plethron in width, and is bordered throughout its length with rich façades of houses and temples.His contemporary Strabo (17.1.7‑10):
The shape of the area of the city is like a chlamys; the long sides of it are those that are washed by the two waters, having a diameter of about thirty stadia, and the short sides are the isthmuses, each being seven or eight stadia wide and pinched in on one side by the sea and on the other by the lake.There are many later sources, but whilst they differ slightly I'm going to ask people to trust that Michaelis has done his research!
One modern furlong is 201.16800 metres, and this is probably a translation issue but I don't have time to pop to the library ...* A stadion was 600 feet according to Herodotus, but the length of a foot varied from state to state, and so did stadia as a result. The Attic stadion of 185 m was adopted by Alexandria and became the standard.
* = my books are still in storage, and those that are not are hiding post flood ... yes, H wouldn't let me move them in, and that's why I'm not going to be Mrs H ... ;-)