Siwan, the transcultural, trans-idiomatic musical collective — an Algerian lead singer, a kemençe player from Turkey, an Iranian master of the tombak, an innovative Norwegian drummer, and an energetic string section of baroque specialists — setting verses by Ummayad princess Wallada bint al-Mustakfi (1010-1091) and contemporaries including Ibn Zaydun (1003-1071)  and Ibn Sara As-Santarini (1043-1123).