Counts · Duchy of Austria · as at first light, 1 January 1200

Hardegg

A comital lordship on the Thaya facing Moravia, held since 1187-88 by the Plain counts, who keep their old house lands in the Salzburg country (written by sal).

Hardegg castle stands on a rock over the Thaya, the Moravian frontier river. How the Plain came by Hardegg is not stated in what we read.

Who he is

Name
Liutold (III) of Plain, count of Hardegg, with his brother Conrad (I)
Title
Counts of Hardegg (of the house of Plain)
Since
Their father Liutpold of Plain became count of Hardegg in 1187-88; Liutold is styled count of Hardegg from 1198, Conrad from 1200
Born
Liutold about 1175; Conrad 1180
Family
Counts of Plain, from Plain above Salzburg, advocates of Salzburg churches. Liutold (III) dies at Treviso on 27 August 1219; Conrad (I) on 4 April 1250. A sister Sophia is recorded 1197-1210. Their brother Otto died 23 August 1197.
Confidence
low

de.wikipedia Grafen von Plain, which warns that the sources are often faulty and many dates uncertain.

Overlord

Duke Leopold VI of Austria for the county; the house's Salzburg lands lie under the archbishop (sal)

What it holds

  • Hardegg castle and county on the Thaya
  • Country round Hardegg on the plateau west of Retz (extent not pinned)

How it was acquired

Liutpold of Plain became count of Hardegg in 1187-88 (how is not pinned).

Allies and rivals

Neighbours of the Moravian castle of Znojmo across the Thaya.

How things stand that morning

Held by the Plain brothers on 1 January 1200 (which of them held which share is not pinned).

Wealth

Rural rents; the Thaya crossing.

Military

Hardegg castle on the Moravian frontier.

Places of note

  • Hardegg castle: Comital castle over the Thaya

Where the sources disagree

  • The Plain genealogy is muddled: the de.wikipedia table gives Liutold III as count of Hardegg from 1198 and Conrad I from 1200. We give both as joint holders.

Evidence: Genealogy uncertain; the county's extent in 1200 is not pinned (Retz came to the family only in 1254).

On the map: Extent of the county in 1200 not pinned.

Primary sources for Austria

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. Grafen von Plain, de.wikipedia

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