By the middle of the 4th century there existed a Getic kingdom that was to thrive for a century. The Getic capital was Helis, which has been identified with the archaeological site of Sboryanovo, which was founded in the 330s or early 320s and housed around 10.000 inhabitants. It seems that the Getae also became active in Muntenia north of the Danube, a region that would come to constitute a part of the "Dacia" of imperial Roman historiography. The first Getic king to appear in the sources was Cothelas, who married his daughter Meda to Philip II, thus concluding an alliance between the two states. This probably happened during or shortly after Philip's conquest of the Odrysians. The kingdom survived two wars with Lysimachus and the Celtic invasion in around 280, but eventually disintegrated a few decades later. Helis/Sboryanovo was completely destroyed by an earthquake in the middle of the 3rd century.