Loviisa was originally called Degerby, but king Adolf Frederick of Sweden renamed the city after his spouse Lovisa Ulrika after visiting the town in 1752.

King Adolf Frederick of Sweden visited Degerby in 1752 and renamed the town as Loviisa after his wife, Queen Louisa Ulrika of Prussia.

[9] The first mayor of Loviisa from 1747 to 1765 was Jacob af Forselles, who had fled from Hamina and bought the Petjärvi (Strömfors) ironworks together with Anders Nohrström.

[12] After the fire there was a proposal to move the town to the south, but the Imperial Senate decided in April 1856 to rebuild Loviisa at its original site.

The reconstruction was done according to Ernst Lohrmann's zoning plan, which was largely based on Georg Theodor Chiewitz's proposal made before the fire.

According to historian Olle Sirén, Creutz's entry into the business was based on his need to secure the sales of barley at the Malmgård manor.

The socialists tried in vain to seek Russian military help from Helsinki, and during the same evening there was an attempt at the Workers' House to declare the strike as finished.

Preparation for the civil war included Jaeger training in Germany, and the first Finn to travel there was Georg Öhman, referred to as "Jäger Eins", the son of a doctor in Loviisa.

The civil war broke out on 27 January, and a bit more than a week after that the whites controlled the eastern part of the Uusimaa region from Sipoo to Loviisa.

[10]: 235–239  At the start of April, Mannerheim's troops occupied Tampere, and the German Detachment Brandenstein numbering 3000 men landed in Valko, advancing to Uusikylä and Lahti.

In spring 1941 the Finnish Brother-in-Arms Association started to produce a Military Village project to the southwestern side of Myllyharju together with Ragnar Nordström.

The city of Loviisa had owned the lands of the island and its surrounding, and sold them to the nuclear power company Imatran Voima a few years earlier.

[10]: 242–245, 288 The two largest companies in Loviisa - the Nordström concern and Rauma-Repola - were under great difficulties in the middle 1960s, so building a nuclear power plant in the city was seen as important.

In March 1977 President of Finland Urho Kekkonen and Premier of the Soviet Union Alexei Kosygin inaugurated the first nuclear power plant unit.

The power plants had utilised large amounts of western technology right from the start, and their usage levels have reached international top rankings.

[26] A new residential area named Kuningattarenranta is being built on the eastern shore of the Loviisanlahti bay, which will host the 2023 event of the Asuntomessut fair.

The manor concentration of Sjögård, Tervik and Tjusterby in Pernåviken dating from the Middle Ages forms a nationally significant cultural area.

There has previously been pilot activity in Boistö and the neighbouring island of Lehtinen (Swedish: Lövö), but they now host accommodation services and meeting facilities.

The guided tours, an exciting adventure for juniors and a restaurant lure both boaters and people travelling by the ferry boat, which does regular traffic between Loviisa centre and Svartholm.

The division advanced as far as to Lahti, before returning to Loviisa in order to leave the country on 16 December 1918, as Germany had lost World War I.

There is also an industrial park in the Uusikaupunki district, housing many smaller companies, for instance mechanical shops and retail sellers of spare parts.

Companies in the Tesjoki industrial area include Kuusisen Kala (Disa's Fish), Eltete (wood and paper refinery) and Nalco Finland Manufacturing producing special chemicals.

[52] The construction of the new Swedish-speaking senior stage primary school in the centre of Loviisa - Lovisavikens skola - used slightly more modern wood materials, cross-laminated timber elements and laminated beam bars.

It is a so-called "Roope harbour" meaning it fulfils the environmental requirements of the Pidä Saaristo Siistinä ("Keep the Archipelago Clean") union.

Recurring events include Loviisan Wanhat Talot, the Small Ships' Race boat festival, Midsummer parties in Laivasilta and Svartholm, Avoimet puutarhat, Loviisan Rauhanfoorumi, the reader festival of the Nya Östis newspaper, the Loviisa Week, the "Kuningas saapuu Loviisaan" ("The King arrives in Loviisa") weekend and toto races.

There is a Brandenstein march in April, followed by Vappu celebrations at the market square and in Laivasilta, and the opening of the summer season at the Strömfors ironworks later in May.

[65] There is a private padel hall in Uusi teollisuusalue in Loviisa, and there is a bowling alley operated by Loviisan Keilailuliitto in the Rauhala district.

[70] The Kukuljärvi hiking route is located near the Strömfors ironworks, starting from the Ruukki sports centre, with a large free-of-charge parking site.

[81] There is also an active photography club in the city - Loviisan Kameraseura - with its own convention space and studio in the Meijeri building on Chiewitzinkatu.

The health centre is only on call duty at office hours, but Loviisa citizens can also seek care at the Kymenlaakso central hospital.