fˈɑːloʊɪŋ ðə ɹᵻfˈɔːɹmz ʌv klˈɛsθiːnz ɪn fˈaɪvhˈʌndɹɪd ˈeɪt, ðə sˈɪɾiz dˈiːmz ʌv mˈæɹəθˌɑːn, ˈoʊnoʊ, ænd tɹˈaɪkoːɹˌɪθəs wɜːɹ ˈɔːɹɡɐnˌaɪzd ˌɪntʊ ɐ sˈɪŋɡəl tɹˈɪɾɪz ɐlˈɔŋ wɪððə sˈɪɾi ʌv ɹˈæmnəs, wˌaɪlst pɹˈoʊbɐlˌɪnθəs bᵻlˈɔŋd tʊ ɐnˈʌðɚ tɹˈɪɾaɪz; nˌʌnðəlˈɛs, ðə fˈɔːɹmɚ wʌz ˈɔfən stˈɪl ɹᵻfˈɜːd tʊ æz ðə tɛtɹˈæpəlˌɪs dᵻspˈaɪt nˌɑːt ɪŋklˈuːdɪŋ pɹˈoʊbɐlˌɪnθəs.
Following the reforms of Cleisthenes in 508, the cities (demes) of Marathon, Oenoe, and Tricorythus were organised into a single trittys along with the city of Rhamnous, whilst Probalinthus belonged to another trittyes; nonetheless, the former was often still referred to as the Tetrapolis despite not including Probalinthus.