The largest area of the Municipal House is the central Smetana Hall, accessible from the foyer on the first floor. By naming the concert hall, Prague paid tribute to the creator of Czech modern music, Bedřich Smetana. Of the plastic decoration, the most remarkable are the stucco groups Vyšehrad and Slavonic Dances on the sides of the stage by Ladislav Šaloun. The sculptor thus happily solved the question of commemorating the second genius of Czech music, Antonín Dvořák. To Smetana's Vyšehrad from the cycle of symphonic poems My Homeland, the character of the legendary Lumír, accompanied by a harp, narrates the myth of the homeland, while the opposite dancing couple is a motif taken from Dvořák's Slavonic Dances. In the interior of the Smetana Hall, however, there is a reminder of other Czech composers, whose portrait medallions are located on the bust of the lodges and the balcony.
Paintings of the ceiling panels and wall paintings by Karel Špilar contribute to the overall airy and at the same time festive impression of the space. Especially the monumental murals Music, Poetry, Dance and Drama are among the author's best works ever.
Smetana's Hall is primarily a concert hall for 1,200 listeners, in which since its opening the world's most important ensembles and performers have performed, and occasionally various social events take place here - especially traditional balls or popular representative gala dinners. The Prague Spring music festival is regularly opened and closed in the Smetana Hall.