to as 'claustro lydosiensi'. Lödöse is also mentioned several times in the Icelandic sagas. Sturla Þórðarson's Hákonar saga Hákonarsonar incorporates a skaldic verse mentioning Lödöse in connection with a meeting at the town between the Norwegian prince Hákon the Younger and the Swedish ruler Birger jarl in 1249. The verse ran, loosely translated: Lödöse had a major disadvantage in that it was located upstream of the Norwegian fortress at Bohus, which meant that in times of war the garrison there could interfere with river traffic between Lödöse and the sea. This was not an issue for much of the Middle Ages, as wars between Sweden and Norway were generally infrequent and short during this period. However, from 1448 onward Sweden was embroiled in frequent wars with Denmark-Norway, which seriously hampered Lödöse's ability to trade with the outside world. Nya Lödöse In 1473, the Swedish regent Sten Sture the Elder tried to establish an alternative settlement downstream of Bohus, at the confluence of the river with the Göta Älv, in order to prevent the fortress from interfering with Swedish trade. Formally it was known as Göthaholm, but it soon came to be called "New Lödöse" (), as many of the first inhabitants were former citizens of (Old) Lödöse. However, the new location (in what is now the Gamlestaden district of eastern Gothenburg) proved to be vulnerable to Danish-Norwegian raids, and Nya Lödöse was repeatedly sacked, notably in December 1507 by Henrik Krummedige. Älvsborg Town Älvsborg Castle had originally been built in the 1360s at the mouth of the Göta Älv. In November 1545, King Gustav I decided to relocate Nya Lödöse to a site directly adjacent to the castle so that the town could benefit from its protection. The relocation of the townspeople was effected in summer 1547, and on 30 July of the same year the new town is attested in documents for the first time, with the name "Älvsborg Town" (). However, in 1563, at the outbreak of the Northern Seven Years War, a Danish army attacked Älvsborg, captured the castle and razed Älvsborg Town. The Gothenburg of Charles IX In 1607 Gustav's son, King Charles IX, founded a new settlement directly across the Göta Älv from Älvsborg, on the south side of the island of Hisingen, in what is now the district of . It was named Göteborg (Gothenburg), and was the first settlement to bear this name.