Sayn

Sayn was a small German county of the Holy Roman Empire which, during the Middle Ages, existed within what is today Rheinland-Pfalz.
There have been two Counties of Sayn. The first emerged in 1139 and became closely associated with the County of Sponheim early in its existence. Count Henry II was notable for being accused of satanic orgies by the Church's German Grand Inquisitor, Conrad von Marburg, in 1233. Henry was acquitted by an assembly of bishops in Mainz, but Conrad refused to accept the verdict and left Mainz. It is unknown whether it was Henry's Knights which killed Conrad on his return to Thuringia, but investigation was foregone due to the cruelty of Conrad, despite Pope Gregory IX ordering his murderers to be punished. With the death of Henry in 1246, the County passed to the Counts of Sponheim-Eberstein and thence to Sponheim-Sayn in 1261.

Wikipedia