wˌɛn ðə hˈaʊs sˈɪstəm fˈɜːst kˈeɪm ˌɪntʊ ɪfˈɛkt ɪn dʒˈuːn nˈaɪntiːnhˈʌndɹɪd twˈɛnti sˈɛvən, ðɛɹwˌɜː fˈoːɹ hˈaʊzᵻz: ˈæθᵻnz, ɹˈoʊm, spˈɑːɹɾə ænd tɹˈɔɪ.
When the house system first came into effect in June 1927, there were four houses: Athens, Rome, Sparta and Troy.