This paper introduces ATHAR, a large-scale, high-quality dataset for English translation of classical Arabic literature. It highlights the importance of classical Arabic literature and the need for translation, while addressing the limitations of existing, limited datasets. The ATHAR dataset comprises 6,600 high-quality translation samples spanning diverse fields, including science, culture, and philosophy. It demonstrates the necessity and applicability of this dataset through performance evaluations of state-of-the-art large-scale language models (LLMs). It is publicly available on the HuggingFace Data Hub.