(1895) above the main entrance on rue de Clignancourt The main building grew in stages within the large city block between rue de Clignancourt, rue Christiani,
boulevard Barbès, and rue de la Nation (known since 1971 as rue de Sofia). In 1874, Crespin commissioned the first purpose-built expansion designed by architect , then assisted by his son Stephan. The program entailed lavish artistic sponsorship with 200 statues, 180 paintings, a giant stained steel window, The entrance porch was overlooked by a monumental relief by Dalou and flanked by two large allegorical bronze groups by Falguière, respectively representing
Advertising () and
Credit, the two areas in which Dufayel had most distinctive leadership. Rives then designed two towering rotundas on boulevard Barbès, at the respective corners with rue de la Nation and rue Christiani. The expansion was completed in 1913, Falguière's bronze statues of
Advertising and
Credit were acquired by
Daisaku Ikeda, founder of
Soka Gakkai International, and transported to Japan in 1969. They were both installed on the campus of
Sōka University in
Hachiōji near Tokyo at its inauguration in 1971. In 2019, BNCI's successor
BNP Paribas sold the building for redevelopment. The (by then) 12,500-square-meter property was renovated by on a design by Paris-based firm Yrieix Martineau Architecture. In February 2026, it was announced that most of the complex would host an
AI-themed
coworking facility branded Cortex House. ==Gallery==