The Ludwig-Maximilian-University / Munich and the Dominican Convent of Hamburg have announced the death of Prof. Dr Ulrich Horst OP on 9 December at the University Hospital Bad Homburg/Saar at the age of 93. The internationally recognised professor and researcher dedicated a large part of his carefully documented research to the topic of ‘Pope - Council - Infallibility’ ("Papst – Konzil – Unfehlbarkeit" the title of his habilitation thesis from 1978 and also his last major publication, the volume of essays entitled ‘Päpstliche Unfehlbarkeit wider konziliare Superiorität? Studies on the history of an [ecclesiological] antagonism from the 15th to the 19th century’ in 2016). R.I.P.
A shortlist of his publications (from the perspective of conciliar history) can be found on the website of Konziliengeschichte; here the obituary of the Dominican Convent Hamburg.