was made on this enormous construction project, but it was far from completed when the war ended, and today, there are few physical remains of it. Municipal history The city of Trondheim was established on 1 January 1838 (see formannskapsdistrikt). On 1 January 1864, part of Strinda (population: 1,229) was amalgamated with Trondheim. Then, on 1 January 1893, another part of Strinda (population: 4,097) was transferred to Trondheim. On 1 January 1952, the Lade area of Strinda (population: 2,230) was transferred to Trondheim. On 1 January 1964, a major municipal merger took place: the neighbouring municipalities of Leinstrand (population: 4,193), Byneset (population: 2,049), Strinda (population: 44,600), and Tiller (population: 3,595) were all merged with the city of Trondheim (population: 56,982), which nearly doubled the population of the municipality. On 1 January 2020, the neighboring Klæbu Municipality (population: 6,050) was merged with Trondheim Municipality. Coat of arms and seal The coat of arms dates back to the 13th century. To the left, there is an archbishop with his staff and mitre in a church archway. On the right, a crowned king holding scales in a castle archway. These two pictures rest on a base which forms an arch. Underneath that arch, are three male heads which symbolise the city's rank as Norway's first capital and the archbishop's place of residence. The scales symbolise justice and the motif is based on the political philosophy of the 13th century, where the balance of power between king and church was an important issue. The three heads at the bottom may symbolise the city council. The motif is unique in Norwegian municipal heraldry, but similar motifs are found in bishopric cities on the continent. The design of the coat-of-arms that was adopted in 1897, and is still used today, was made by Håkon Thorsen. Geography Trondheim is situated where the River Nidelva meets Trondheim Fjord with an excellent harbour and sheltered condition. In the Middle Ages the river was deep enough to be navigable by most boats. However, in the mid-17th century, an avalanche of mud and stones made it less navigable, and partly ruined the harbour. The municipality's highest elevation is the Storheia hill, above sea level. At the summer solstice, the sun rises at 03:00 and sets at 23:40, but stays just below the horizon. Between 23 May and 19 July, when the sky is cloud-free, it remains light enough at night that