I suppose it is the battle of Lena (1208).
Lena is correct! Well done, sir.
Explanation of the clues:
1. The war god Odin riding on his 8-legged horse, Sleipnir. Legend has it that the Swedish army saw Odin in the sky and took heart from that and drove the Danes into a bog. This is interesting since the legend is written down in 2 different places and Sweden had been Christian for some time.
2. A replica of the castle that stood above Lena. Just ruins left.
3. Erik Knutsson. King of Sweden 1208-1216. Crowned in 1210 as the first known Swedish king to do so.
4. A reenactment of the battle of Lena (1208) for the TV series "Arns rike". According to an old agreement, two houses (the Eriks and the Sverkers) would alternate the Crown, but Sverker, the current king who had strong Danish connections, got greedy and tried to kill all the sons of the old king. He killed three of four at Älgarås in 1205 but Erik escaped and fled to Norway. In 1208 he returned with an army that may have included Norwegians as well. Sverker raised a larger army in Denmark and they clashed at Lena. Not much is known about the battle, except that the Danes were routed. Two great men of the powerful family Hvide was killed, and Sverker escaped. He got killed 2 years later at the battle of Gestilren, exact location unknown.
5. The village church. Possibly built by king Erik Knutsson as a reminder of the battle and to replace the old church that was torched in the battle. There are remains in the church that suggest the first church was built in the 12th century. The towers were added later to symbolise the fact that Birger Jarl, de facto ruler of Sweden 1250-1266, his son king Valdemar and the Norwegian king Håkon celebrated easter mass here.
6. Birger Jarl. He founded Stockholm in 1252 and ruled Sweden 1250-1266. He spent some time in Lena as mentioned.
7. Torgils Knutsson was marshal and virtual ruler of Sweden during the early reign of king Birger Magnusson (Birger jarls grandson). Among other things, he led the third crusade against the Finns, conquered parts of Karelia and founded Viborg. He got involved in a power struggle between the king and his brothers. Eventually, the brothers united and converged on Torgils estate Lena and he was arrested there. He was brought to Stockholm in chains and eventually executed in 1306.
8. Lena Olin. Well, her name is Lena, isn't it.
Footnote: The place is today called Kungslena and is located west of the lake Vättern, close to Skara.
Nice try!
