The travel!digital Thesaurus is a knowledge organization system for the travel!digital Corpus, a unique collection of historical Baedeker travel guides published between 1875 and 1914. The digital full-texts and the thesaurus were created within the travel!digital project (Project-Nr.: ÖAW0204, 1.12.2014-30.11.2017) at the ACDH - Austrian Centre for Digital Humanities of the Austrian Academy of Sciences. Exclusively reflecting the vocabulary contained in the travel guides, the thesaurus uses spellings and translations from there. The primary language is German (4908 entries), followed by English (177), Arabic (81), French (52), Spanish (25) and other languages with less than 25 entries. The focus is on group designations (amongst others geographical oriented designations, ethnic/national, religious and social communities as well as professions) and selected sights.