Passage 1.5.1
τοῦ βουλευτηρίου τῶν πεντακοσίων πλησίον Θόλος ἐστὶ καλουμένη, καὶ θύουσί τε ἐνταῦθα οἱ πρυτάνεις καί τινα καὶ ἀργύρου πεποιημένα ἐστὶν ἀγάλματα οὐ μεγάλα. ἀνωτέρω δὲ ἀνδριάντες ἑστήκασιν ἡρώων, ἀφʼ ὧν Ἀθηναίοις ὕστερον τὰ ὀνόματα ἔσχον αἱ φυλαί· ὅστις δὲ κατεστήσατο δέκα ἀντὶ τεσσάρων φυλὰς εἶναι καὶ μετέθετό σφισι τὰ ὀνόματα ἀντὶ τῶν ἀρχαίων, Ἡροδότῳ καὶ ταῦτά ἐστιν εἰρημένα.
Near to the Council House of the Five Hundred stands the building called the Tholos, where the Prytanes perform sacrifices; there are also some small statues here made of silver. Higher up stand statues of the heroes from whom the Athenian tribes later derived their names. Herodotus already tells us who it was who established ten tribes instead of four and transferred to them these new names in place of the old.