This church is one of the best examples of high baroque north of the Alps. However, K. I. Dienzenhofer's 1711 design didn't have the massive dome that now dominates the Lesser Town skyline below Prague Castle.

Dienzenhofer's son, Krystof, added the 78m (260-ft.) high dome during additional work completed in 1752.

The interior of the Church is dramatic. The primary nave with its side chapels connects onto the presbytery with its giant dome carried by two robust arches. A platform is placed above the chapels and illusive frescos are painted onto its individual vaults. Large side windows bring light into the interior and help to create an overall impression.

Rare materials decorated with gilding and rich linings of artificial marble, which is also used in the original paving, which has been preserved in the entire Church, most probably date back to 1760. A giant statue of the church's namesake looks down from the high altar.

Mozart played the organ here during his stay in Prague. Also, in the movie Van Helsing, it is where dracula held the masquerade ball.

Classical music concerts are performed daily, and ticket prices are reasonable (concerts are usually held at 5pm).

Prague has two St Nicolas churches, and this one is on the opposite side of the Old Town Square, with a great view of the Church of Our Lady before Tyn.

This is a rather beautiful church with an unimpressive exterior. Inside is a large, extravagant crystal chandelier in the shape of Czech crown, white painted walls with baroque decorations, and beautiful, brightly colored frescoes of four evangelists above the balcony and on the ceiling, in the best Italian tradition, which don’t go well with the fresco of Christ behind the altar, which is more modern. St Nicolas Church is a crowning achievement of Prague baroque architect Kilian Ignac Dientzenhofer, who apparently also built the other St Nicolas Church (it was started by his father). This church was built for Benedictine monks. An 18th-century organ is decorated with statues of angels and gilded ornaments of drapes. It is a very bright church with wooden seats and a dark brown marble altar. To the right of the entrance, there is a small bookshop with postcards and books about this church and Prague. In the evening, you can also enjoy a concert in this church--tickets cost 300Kc.