In introductions to the Thesaurus Linguae Latinae it is always stated that the ThLL considers all texts up to about 600 AD. But what does this mean in concrete terms: ‘all’ and ‘up to approx. 600’? Is an inscription from the year 610 still cited? And how did the ThLL define this limit? I will deal with these questions here. In addition, I will briefly explain to what extent the ThLL is not only the most comprehensive Latin dictionary, but also the only modern Late Latin dictionary.