Blessed Thiemo (Thimo, also Dietmar, Theodinarus) (about 1040ndash28 September 1101/02) was a martyr (Christian martyr) and Archbishop of Salzburg (Archbishopric of Salzburg) from 1090 until his death.

A scion of the Bavarian (History of Bavaria) comital House of Vornbach (Vornbach Abbey) (Formbach), Thiemo reportedly was a talented painter and sculptor. He entered the Benedictine abbey of Niederaltaich (Niederaltaich Abbey) and in 1077 became abbot of St. Peters (St. Peters Archabbey, Salzburg) in Salzburg. Under Archbishop Gebhard (Gebhard of Salzburg) he was caught up in the Investiture Controversy, as a papal supporter in opposition to German king Henry IV (Henry IV, Holy Roman Emperor). In 1081 he went into exile, at first to M�nchsdeggingen and Hirsau (Hirsau Abbey), later to Admont (Admont Abbey). In 1086 he was able to retun to Salzburg, together with Archbishop Gebhard, whom he succeeded in 1090, confirmed by Pope Urban II.

In 1095 Archbishop Thiemo attended the Council of Piacenza, while the domestic conflict with antibishop Berthold of Moosburg, who had been appointed by Henry IV, continued. He was defeated by Bertholds troops in 1097 and escaped to Carinthia (Duchy of Carinthia), where he was arrested at Friesach by the forces of the Gurk bishop (Roman Catholic Diocese of Gurk). Freed by a loyal monk, Thiemo found a refuge in the diocese of befriended Bishop Gebhard of Constance (Gebhard (III) of Constance) at Petershausen Abbey.

In 1101 Thiemo decided to join Duke William IX of Aquitaine (William IX, Duke of Aquitaine) on his crusade (Crusade of 1101) to Palestine and did not return. Several traditions concerning his death exist. He may have been taken captive by the Seljuqs of R�m (Sultanate of R�m) at Ere?li (Ere?li, Konya) (Heraclea) in Anatolia in September 1101 or was imprisoned by the Fatimid Caliphate at Ashkelon in the following year. His martyrdom is described being tortured and killed by pulling the intestines out of his body with a spindle.

He was never formally canonized (Canonization) but is commemorated (Commemoration (prayer)) as a martyr by the Catholic Church. His name day is 28 September.