Jekabpils/Krustpils - Krustpils was first recorded in documents in 1237 in relation to the construction of the Kreutzburg castle on the right bank of the Daugava River.
The Jersika castle hill - This location is important in terms of Latvia’s history, because during the 12th and 13th century, this was the administrative and spiritual centre of the Lettigalian tribe.