On
Number 6 is the
Postmuseum, a postal museum which boasts unique historic postal and philatelic collections. The entire block constituted the only post office in the capital from its inauguration in 1720 until the opening of the museum in 1906. The present façade, designed by
Fredrik Blom in 1820–1825, is centred on the four green
Ekeberg marble columns standing on the pavement, the
doric capitals supporting a balcony decorated with
sphinxes. While the windows of the
piano nobile support
pediments with
corbels, the upper part of the composition is gradually simplified. The interior was rebuilt in 1986 and the entire building extensively restored in 1999. == See also ==