dˈoːɹz ˈoʊpən tɚɹˈɑːntoʊ wʌz dɪvˈɛləpt æz ɐ mɪlˈɛniəm pɹˈɑːdʒɛkt ɪn tˈuː θˈaʊzənd, baɪ ðə sˈɪɾi ʌv tɚɹˈɑːntoʊ dɪvˈɛləpt fɹʌm ɐ jˌʊɹɹəpˈiən mˈɑːdəl ænd hɐz sˈɪns ɐtɹˈæktᵻd ˌoʊvɚ wˈʌn.sˈɛvən mˈɪliən ɹˈɛzᵻdənts ænd tˈʊɹɹɪsts.
Doors Open Toronto was developed as a millennium project in 2000, by the City of Toronto (developed from a European model) and has since attracted over 1.7 million residents and tourists.