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

Sora

Sora, on the upper Liri where the road from the papal Campagna enters the Kingdom, is not papal on the morning of 1 January 1200.

The town and the rock castle of Sorella above it are held by the German Conrad of Marlenheim, one of Markward's party, as they have been since Henry VI gave them to him in 1191. The pope wants Sora, as guardian of the boy king and as lord of the Campagna next door, and his family wants it more: it falls to the papal side only in January 1208, and becomes the county of Innocent's brother Riccardo that October.

Who holds it

Name
Conrad of Marlenheim
Title
Lord of Sora and castellan of Sorella, for the Staufen party
Since
1191 (granted by Henry VI; kept after the court at Bari in 1195)
Confidence
high

An Alsatian ministerial from Marlenheim who came south with Henry VI in 1191 and received the fortress of Sora and the castle of Sorella; he kept them after the Bari court of 1195, sided with Markward after Henry VI's death, and was still fighting alongside Diepold against Walter of Brienne in 1205. On 5 January 1208 the citizens of Sora gave their town to the abbot of Montecassino; Conrad then surrendered himself and Sorella to Riccardo dei Conti and vanishes from the record (DBI on Conrad). In October 1208, at Ferentino, Innocent III invested his brother Riccardo with the county of Sora; the Holy See had bought Rocca d'Arce the same year (DBI on Riccardo Conti).

What it holds

  • Sora: town on the Liri, held by Conrad of Marlenheim's garrison
  • Sorella: the castle on the rock above Sora, Conrad's stronghold
  • No papal garrison or officer: the pope's claim is that of the king's guardian and overlord

How it was acquired

Sora belonged to the Kingdom of Sicily (Terra di Lavoro) after the Norman conquest. Henry VI granted it to Conrad of Marlenheim in 1191. It came to the papal side only in 1208.

How things stand that morning

Occupied, from the papal point of view, by Conrad of Marlenheim for the Staufen and Markward's party. Not part of the Papal State.

Wealth

The Liri crossing and the road from the Campagna into the Kingdom; the junction with the roads to the Marsica and the Val Comino; river mills.

Threats

  • Raids by papal and Campanian knights from Ceprano and Veroli
  • The townsmen's dislike of the German garrison (they hand the town over in 1208)
  • Montecassino's ambitions

Advocates and rivals

Conrad of Marlenheim and his Germans; Diepold, who holds Rocca d'Arce and Aquino nearby (DBI on Diepold); the abbot of Montecassino, to whom the townsmen will turn in 1208; the papal rector of the Campagna across the frontier; the Conti family.

Places of note

  • Sorella: Rock castle above Sora, Conrad of Marlenheim's stronghold

Where the sources disagree

  • The campaign notes (Parts 2 and 5) say Innocent took back Sora from Conrad of Urslingen in 1198. The DBI entries on Conrad of Marlenheim and on Riccardo Conti say Sora and Sorella were held by Conrad of Marlenheim, a different German, from 1191 until January 1208, and the DBI on Conrad of Urslingen lists only Cesi, Gualdo and Assisi as surrendered in 1198. On 1 January 1200 Sora is a German-held lordship inside the Kingdom, not a papal one. The two Conrads seem to have been run together; the campaign should rule.

Evidence: Two independent DBI entries agree on the dates; Sora's own history page has nothing for these years.

On the map: Drawn only as the modern commune of Sora, grey-hatched as occupied: it is a papal target, not a papal possession, on 1 January 1200.

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)
  2. Riccardo Conti (Treccani, Dizionario Biografico)
  3. Corrado di Urslingen (Treccani, Dizionario Biografico)
  4. Dipoldo di Schweinspeunt (Treccani, Dizionario Biografico)
  5. Sora (it.wikipedia)

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