The first bits about Baltic religion were written down by Herodotus describing Neuri (Νευροί) in his "Histories" and Tacitus in his "Germania" mentioned Aestii wearing boar figures and worshipping "Mother of gods". Neuri were mention by Roman geographer Pomponius Mela. In the 9th century there is one attestation about Prussian (Aestii) funeral traditions by Wulfstan. In 11th century Adam of Bremen mentioned Prussians, living in Sambia and their holy groves. 12th century Muslim geographer al-Idrisi in "The Book of Roger" mentioned Balts as worshipers of Holy Fire and their flourishing city "Madsun" (Mdsūhn, Mrsunh, Marsūna).