The article discusses the development of History LLMs, large language models trained exclusively on pre-1913 texts, which can provide a window into the past and enable research in the humanities and social sciences. These models are time-locked, meaning they do not have access to information beyond their knowledge-cutoff date, and can be used to explore discourse patterns and understand historical views. The project aims to make the models accessible to researchers, teachers, and the broader public, while also acknowledging the potential for the models to reproduce racist, misogynistic, and other problematic views present in historical texts.