<Dd> Sigurd I of Norway led the Norwegian Crusade against Muslims in Spain, the Balearic Islands and in Palestine . </Dd> <Dl> <Dt> 1147--1149 </Dt> <Dd> The Second Crusade was waged in response to the fall of the County of Edessa . </Dd> </Dl> <Dt> 1147--1149 </Dt> <Dd> The Second Crusade was waged in response to the fall of the County of Edessa . </Dd>

What is the 2nd oldest religion in the world