ʌnlˈaɪk ðə pjˈʊɹli ɡˈɑːθɪk nˈɑːɾɚ dˈeɪm, ðə tʃˈɜːtʃ ʌv sˈeɪnt nˈɪkələz dɪsplˈeɪz ɐ mˈɪkstʃɚɹ ʌv bˈɪzɐntˌiːn ænd ɡˈɑːθɪk fˈiːtʃɚz: ðə kənstɹˈʌkʃən tɛknˈiːks, skwˈɛɹ plˈæn, ænd tɹˈɪpəl ˈæpsᵻz sədʒˈɛst bˈɪzɐntˌiːn ˌɑːɹkɪtˈɛktʃɚɹəl ˈɪnfluːəns, bˌʌt ðə tɹˈaɪpɑːɹtˌaɪt bæzˈɪlɪkəl ɚɹˈeɪndʒmənt ʌvðɪ ɪntˈɪɹiɚɹ ɪz ɐ wˈɛstɚn fˈiːtʃɚ ænd mˈɛnɪəv ðɪ ˌɑːɹkɪtˈɛktʃɚɹəl diːtˈeɪlz, sˈʌtʃ ɐz ðə pˈɔɪntᵻd ˈɑːɹtʃᵻz ʌvðə wˈɪndoʊz ænd ðə bˈeɪsᵻz ʌvðə pˈɪɹz ɔːɹ kˈɑːlʌmz sˈɛpɚɹˌeɪɾɪŋ ðə nˈeɪv ænd ˈaɪəlz, ɑːɹ ɡˈɑːθɪk.
Unlike the purely Gothic Notre Dame, the church of Saint Nicolas displays a mixture of Byzantine and Gothic features: the construction techniques, square plan, and triple apses suggest Byzantine architectural influence, but the tripartite basilical arrangement of the interior is a western feature and many of the architectural details, such as the pointed arches of the windows and the bases of the piers or columns separating the nave and aisles, are Gothic.