Other lordship · Diepold of Acerra and the German captains · as at first light, 1 January 1200

Conrad of Marlenheim

An Alsatian ministerial who came south with Henry VI in 1191 and was given the rock of Sorella and the town of Sora on the upper Liri.

He has held them ever since, through Tancred's war, and after Henry VI's death he joined Markward and fights alongside Diepold. All the chroniclers, even those friendly to the Staufen, call his rule brutal and lawless. Henry VI himself in 1194 ordered the castellan of Sorella and Rocca d'Arce to stop harassing the abbey of Casamari. On 1 January 1200 he holds Sora and Sorella.

He keeps Sorella until January 1208, when the people of Sora give their town to the abbot of Montecassino and he hands the castle to Richard Conti, the pope's brother.

Who he is

Name
Conrad of Marlenheim
Title
Lord of Sora and castellan of Sorella, the rock castle above it
Since
1191 (Henry VI's grant after the failed siege of Naples, summer 1191); kept after the court at Bari in 1195
Born
Not known
Family
Imperial ministerials from Marlenheim in Alsace, a family of no great standing. His cousin Hugh (Ugo) of Marlenheim also served Henry VI in the kingdom and held Rocca d'Arce by 1208. A Helferich of Marlenheim appears in 1189 with no proven link.
Confidence
high

DBI life of Corrado di Marlenheim; Church map record Sora.

Overlord

None he obeys: he held Sora by Henry VI's grant and sided with Markward after the emperor's death. The pope claims Sora as the king's guardian and as lord of the Campagna next door; the kingdom's claim is that Sora is a royal lordship of the Terra di Lavoro.

What it holds

  • Sorella, the rock castle above Sora (Rocca di Sora), his stronghold
  • The town of Sora on the Liri, with its bridge and the road junction to the Val Comino and the Marsica
  • Possibly Pescosolido and Brocco, near Sora (the DBI says only 'perhaps')

How it was acquired

Granted by Henry VI in the summer of 1191; confirmed in practice after 1195.

Allies and rivals

Allies: Diepold at Rocca d'Arce, a few miles down the Liri; Markward; his cousin Hugh. Rivals: the pope and his Conti kin, who want Sora; the abbot of Montecassino; the abbey of Casamari, whose lands his men harried; the papal Campagna across the frontier at Ceprano and Veroli (rom's records).

How things stand that morning

Held. Sora and Sorella are German-held inside the kingdom on the frontier of the papal Campagna. They are not papal that morning.

Wealth

The Liri crossing at Sora, the road from the Campagna into the kingdom and the Marsica, river mills, and what his men take from the country round.

Military

The rock castle of Sorella, which no one took by force: it was surrendered in 1208. A small German garrison; no numbers in the sources.

Threats

  • Papal and Campanian knights from Ceprano and Veroli
  • the townsmen of Sora, who hate the garrison
  • the Conti family's ambition for a county of Sora

What the year holds

What happened next, if nothing in play changes it. Each event carries what it depends on and what would stop it.

  1. 1200Holds Sora and Sorella all year; no change is recorded before 1205.Depends on: Diepold's party holding the Liri valley. Stopped by: A papal army turning on Sora instead of going to Sicily.

Places of note

  • Sorella (Rocca di Sora): His rock castle above the town

Where the sources disagree

  • The campaign notes (Parts 2 and 5) say Innocent took back Sora from Conrad of Urslingen in 1198. The DBI lives of Conrad of Marlenheim, Riccardo Conti and Conrad of Urslingen show that Sora and Sorella were held by Conrad of Marlenheim, a different German, from 1191 to January 1208; Conrad of Urslingen gave up only Cesi, Gualdo and Assisi in 1198. Sora is not papal on 1 January 1200 (the Church map record Sora says the same).

Evidence: The DBI dates his tenure 1191-1208 from Richard of San Germano and the Gesta Innocentii; nothing records Sora changing hands in 1199-1200, so his holding that morning is a firm inference rather than a dated act.

On the map: The extent of Conrad's lordship beyond Sora and its rock is not documented; the drawing takes the near country of the town.

Primary sources for Diepold's Germans

Chronicles, registers, sagas and inscriptions written in or near 1200 that cover this entry. Each has its own page with editions, translations and where to read it.

Sources and studies

  1. Corrado di Marlenheim (Treccani, Dizionario Biografico degli Italiani)

Last revised 4 November 2026. Published 4 November 2026. Suggest a correction on the OMNIA Discord.