Pirmin (died 753) was appointed first abbot of the Reichenau Abbey by Charles Martel in 724. Events Synod of Constantinople called by Emperor Constantine V. Samarkand conquered by Arabs. ... 15th-century towers on the Romanesque church of Sts Peter and Paul in Reichenau-Niederzell Reichenau Island lies in Lake Constance in southern Germany, at approximately 47°42′ N 9°4′ E. It lies between the Gnadensee and the Untersee, almost due west of the city of Constance. ... Charles Martel (Charles the Hammer, German: Karl Martell) (August 23, 686 – October 22, 741) was born in Herstal, in what is now Wallonia, Belgium, the illegitimate son of Pippin the Middle (635 or 640-December 16, 714) and his concubine Alpaida or Chalpaida. ... Events End of the reign of Empress Gensho of Japan Emperor Shomu succeeds to the throne of Japan. ...