Photo: Pieter Claerhout, CC BY-SA 3.0 via Wikimedia Commons
A 1967 statue which is said to bring good luck when offered coins.
Järnpojke or Iron Boy is a sculpture in Gamla stan of Stockholm, Sweden by Liss Eriksson, which is only 15 centimetres (5.9 in) high and therefore is the smallest public monument of Stockholm.
© OpenStreetMap contributors
Slottsbacken provides an astounding view of Stockholm's inner harbour. The obelisk was erected by King Gustav III as his gratitude for Stockholm's citizens, for defending the city in the war against Russia from 1788 to 1790. As of 2020, it is absent for renovation. Karl XIV Johan has a statue here. He was born Jean Bernadotte, was a Napoleonic field marshal, who became Crown Prince, and later King of Sweden. The House of Bernadotte has been on the Swedish throne since then.
Nobelmuseet
Located in the old Stock Exchange house in the middle of Gamla stan, this museum has lots of material on the Nobel Prize, including videotaped speeches by laureates. Gift shop sells "Nobel medals" that are big chocolate coins in stamped gold foil, great souvenir/gift.
Storkyrkan
Storkyrkan is the oldest church in Gamla stan. Built in the 13th century in the Gothic style, the exterior was remodelled in Baroque style around 1740. The church is the seat of the Church of Sweden bishop of Stockholm. It contains two pieces of famous artwork: the 15th-century wooden statue of Saint George and a copy of the oldest known image of Stockholm, Vädersolstavlan ("The Sun Dog Painting"), a 1636 copy of a lost original from 1535.
Stockholm's oldest square, dated back to the 13th century. While the square was used for corporal punishment during most of its history, the most infamous event was the 1520 Stockholm Bloodbath, where Danish king Kristian II (who since then has been known as Kristian the Tyrant in Sweden) had a hundred Swedish noblemen and dignitaries executed for heresy. The massacre caused an uprising against the Danes, in which Gustav Vasa became Sweden's first sovereign king in 1523. A cannonball is stuck in a building wall at Skomakaregatan. It was said to originate from Gustav Vasa's liberation of Stockholm; it was however added when the building was erected in 1795, as a purely symbolic commemoration of the war. The well was built in 1778. As it ran dry (due to the rising land), it was moved to Brunkebergstorg in 1857. Since 1953 the well is back, fed with tap water. Occasional markets and fairs are held on Stortorget, including a Christmas market.
A runestone from the Viking Age made around AD 1100 and accidentally famous due to ending up in a wall of a 17th century building. The laconic inscription says Thorsteinn and Freygunnr had this stone [raised] in memory of [...] their son. There is no evidence that these people had travelled far; the few runestones that mention overseas travellers (Vikings) are much more famous. The cannon was set up in the 17th century to protect the building from wagons.
Livrustkammaren
Located in the Royal Palace, still an independent museum. In 1628, King Gustavus II Adolphus declared that his uniform from the Thirty Years War campaign in Poland should be put on display for eternity. Since then, the Royal Armoury keeps these objects, and other Royal memorabilia, branding itself "Sweden's oldest museum".