The fortress had been built in Sukhum by Saulah - the great king La of the Lana clan.
翻訳についてのコメント
Apparently the source text has grammar mistakes. The Prepositions 'в' and 'из' are in wrong places. But thanks to Google I found out that Sukhumi or Sukhum (a spelling once preferred in Imperial Russia) it is the capital of ABKHAZIA. And SAULAH is the czar who long time ago had built a fortress in there. So I think they wanted to say 'КрепоÑÑ‚ÑŒ Ñоорудил в Сухуми, Саулах - царь великий Ла из рода Ланы'