Was interested in this from The Gorgias. Couldn’t think offhand of another place where Athens is singled out for its freedom of speech (ἐξουσία τοῦ λέγειν). 461e, Socrates speaking:
“It would indeed be a hard fate for you, my excellent friend, if having come to Athens, where there is more freedom of speech than anywhere in Greece, you should be the one person there who could not enjoy it.”
δεινὰ μεντἂν πάθοις, ὦ βέλτιστε, εἰ Ἀθήναζε ἀφικόμενος, οὗ τῆς Ἑλλάδος πλείστη ἐστὶν ἐξουσία τοῦ λέγειν, ἔπειτα σὺ ἐνταῦθα τούτου μόνος ἀτυχήσαις.
.i`` * ^ / . . . . . ` `~ 