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The National Theater "Ivan Vazov" is something like a second emblem of Sofia. It was built in the period from 1905 till 1906 for the Duchy of Bulgaria by Ferdinand Fellner & Hermann Helmer. Opened 16 Jan 1907 with Dobri Christov's "Festive Ouverture", Ivan Vazov's scenic prologue "The Fame of Art" and Act V of Vasil Drumev's drama "Ivanko".
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The 'Ivan Vazov' Theatre comprises of 1021 seats. The stage house was destroyed by a fire on 10 February, 1923 ( the auditorium was also damaged because the iron curtain did not work properly). In the period 1923-1928 a newly constructed stage house and a slightly altered auditorium was built by Martin Duelfer.
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From 1972 till 1976 the stage house and exterior of the theatre were renovated to the original plans by Ivan Tomov and Lilija Toteva ( the auditorium was altered again, with only slight references to the 1906 original). The theatre was named in honour of the Bulgarian author, Ivan Mincov Vazov (1850-1921).
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The National Theatre in the city park is a model of Baroque architecture. Along the facade of this majestic building, six columns with beautiful capitals support a large triangular pediment, decorated with mythological high reliefs. To the sides two towers rise up, topped by sculptures of the Goddess Nike.The red, white and gold neo-classical National Theatre 'Ivan Vazov' in Sofia is surrounded by loads of alleys, and is situated amid a pool and fountains and filled with sidewalk cafes.
(http://en.journey.bg/bulgaria/bulgaria.php?guide=800)