CityPaper in Greek with photos and videos.
My friend Michalis Lefantzis has been working on this and kindly discussing it with me for years, so I was worried about disclosing information the archaeologists had not and avoided blogging it.
The key points:
The tomb's construction is well dated by coins to around 310 BC, when Roxana and her son by Alexander the Great, Alexander IV of Macedon, were murdered on the orders of Cassander at Amphipolis. Diodurus of Sicily, 19.105.4:
Afraid for his own safety, he instructed Glaucias, who was in charge of the boy's custody, to assassinate Roxane and the king and conceal their bodies, and not to report the deed to any of the others. Glaucias carried out the orders, and this freed Cassander, Lysimachus, Ptolemy and even Antigonus from anticipated fears about the king. For now that there was no one to take over the empire, those who ruled peoples or cities could each entertain hopes of kingship and controlled henceforward the territory under their power like kingdoms that had been conquered in war.
New pieces of the giant lion, after which the "Lion Tomb at Amphipolis" was named, have been found by Michaelis; but no penis. As I discussed recently, here, "lions" with manes but without a penis ... were in fact lionesses, and used on the tombs of women.
A colossal round retaining wall of limestone faced with Thasian marbles shows that the "Lion" once crowned a tumulus of the sort found at Vergina. The gigantic size of the tumulus means it was a royal burial.
A building inscription gives us the name of the architect - Dinocrates. Dinocrates followed Alexander on campaign, and was the architect of the city plan of Alexandria. (See Virtuvius Praef II).
The tomb was deliberately destroyed in the Roman period, around the second century AD. They put a huge amount of effort into doing so, dragging the blocks, including the lion, into the river Strymon.
I know that there will be more announcements soon, but you'll have to wait to hear about them ... ;-)