Friedrich Blass (1843–1907) and Theodor Thalheim (1847–1921) were German classical scholars who collaborated on Teubner editions of the Attic orators. Blass, a towering figure in Greek philology, was renowned for his Die attische Beredsamkeit (1868–1880), the definitive study of Attic oratory. Thalheim's expertise in Greek legal procedure complemented Blass's philological mastery.

The Blass–Thalheim Teubner editions of the Attic orators provide authoritative critical texts based on thorough manuscript collation. These editions benefit from Blass's unrivalled knowledge of Greek prose rhythm and rhetorical technique, which he used as criteria for evaluating variant readings. The apparatus criticus is full and informative, recording manuscript variants and conjectures from earlier scholars.

K. J. Maidment (Loeb Classical Library)

Text based on the Teubner edition (Blass, rev. Thalheim). Maidment translated for the Loeb Classical Library.