Jerusalem has been described as one of the pioneers of Christian rock in Sweden and an early contributor to the development of Christian hard rock and metal in Europe. The Swedish pop culture magazine OKEJ described the band in 1983 as world-class rock music, and reported two years later that Jerusalem had grown bigger abroad than at home.<ref name="okej1985"/> ABBA's Björn Ulvaeus was reported to have raised an eyebrow — in a good way — at Jerusalem's fresh approach.<ref name="dagen1980volym2"/> Their 1982 music video for "It's Mad," from the album Warrior, was described by Billboard as the first "gospel rock" video on MTV, airing ahead of similar videos by DeGarmo & Key and Stryper.

Jerusalem is a Swedish Christian rock and Christian metal band exemplary of an early hard rock and heavy metal band to discuss Christianity and religious faith in its lyrics. Ulf Christiansson formed the group in 1975 with an expressly evangelistic purpose, with lyrics describing the band's relationship to God in an ordinary, yet radical, way. Their concerts have been described as a series of revival meetings which often included altar calls and occasionally exorcisms. Christiansson himself described this in 1992 as "doing warfare with the music and getting demons out of young people."

In 1994, Jerusalem released Prophet, recorded, according to a contemporary review, from twelve hours of unscripted studio improvisation with not a single song written in advance; the same review called it possibly the best Jerusalem album ever made and predicted its reinvented sound would resonate far beyond the Christian music scene.

Musical career Formation and debut (1970–1979) Before forming Jerusalem, Ulf Christiansson had played in various secular orchestras until he was 21. Following a period of dissatisfaction with life, he connected with the American "Jesus people" movement and became a Christian, after which he abandoned music entirely, remaining musically silent for three years before the idea for Jerusalem was born. Christiansson became a Christian in Gothenburg in 1970, five years before forming Jerusalem. Christiansson formed Jerusalem in 1975 with an expressly evangelistic purpose. The band originally comprised five members: alongside Christiansson, Bertil Sörensson played bass, Danne Gansmoe drums, Dan Tibell organ, and Evert Edin piano.

In 1977, the band appeared on Sveriges Radio's P3 programme Till glädje ("For Joy"), which broadcast contemporary Christian music during prime listening hours, after producer Bosse Lindqvist invited the band to record three songs for the broadcaster. The appearance provoked strong reactions among listeners, both supportive and critical; Christiansson later recalled it simply as "for and against." Shortly afterwards, the band was approached by record label Prim, by recommendation of vocalist Ingmar Johansson. Christiansson has said the band deliberately avoided approaching labels themselves, choosing instead to wait to be contacted in the belief this reflected God's will; three labels called within a week, and the band signed with Prim, the first to call.

The band's eponymous debut album, Jerusalem, released in 1978, became an instant hit among listeners, and within the first six months the record sold 20,000 copies, which was unheard of within the European Christian rock genre. The debut album received a favourable review in the Swedish Christian newspaper Dagen. Critic Conny Söder praised Prim's decision to release it as a bold move deserving applause, judging the band fully comparable in quality to its secular Swedish counterparts and singling out Christiansson as an above-average rock vocalist. Söder also noted that the album was recorded with almost no overdubbing, so that the band sounded the same live as on record, unusual for the period.

The band's early success was notable because Christian rock was still a developing genre in Europe, and Jerusalem's combination of hard rock instrumentation and explicitly Christian lyrics was controversial among some church audiences. The band made its Swedish television debut on 3 March 1979 on the programme Mellan himmel och jord ("Between Heaven and Earth"), broadcast from Falun, and was described at the time as a pioneer of this new, Christian-rock sound in Sweden.

A 1979 profile in Dagen described Jerusalem as formed to capture young people's attention and deliver a Christian message amid renewed cultural interest in rock music in Sweden, noting the band's recent debut LP and an upcoming concert at Polhemsskolan in Gävle on 27 April 1979. The band gained broad acceptance in the late 1970s, concurring alongside the early development of contemporary Christian music.

Volym 2 and international expansion (1980–1981) Ahead of the release of Volym 2 in 1980, Christiansson explained the reasoning behind the band's name, describing it as meant to reflect both the music and its forward-looking direction, while Jerusalem — like the message of Jesus Christ — was meant to remain at the centre of attention. At the time, he worked as a postman and was raising three children, and the band combined music-making with day jobs and family life; even ABBA's Björn Ulvaeus was reported to have spoken positively about the band's fresh approach.

The album was recorded at the Prim studio, with the band deliberately avoiding extra musicians or studio embellishments so as to sound the same on record as in concert. According to the article, Jerusalem had performed 84 shows the previous year, and although the members loved playing, they found it exhausting to balance touring with full-time work, hoping growing interest from the United States and several European countries might eventually let them turn professional.

A 2018 review of a remastered reissue in Heaven's Metal magazine described Volym 2 as more theatrical and progressive than the band's debut, drawing comparisons to Deep Purple's organ-driven style and Queen's theatrical flair. The reviewer singled out "Gethsemane," which told the story of Christ's betrayal and crucifixion "in a way that had not really been done previously," as foreshadowing the musical direction the band would take on Warrior the following year. The same reissue restored two tracks, "Love Song" and "Dialogue (Between One Person)," that had been omitted from an earlier Fruit Records CD release. The album also marked the band's first lineup change, with Anders Mossberg joining on bass and Klas Anderhell on drums.

Americans attending the Christian Greenbelt festival in England, where Jerusalem participated during the summer of 1980, brought the record to the United States. Glenn Kaiser, who led the Resurrection Band–a prominent Christian rock band in the United States–gave the record to Pat Boone, who owned Lamb & Lion Records, the label that subsequently released Jerusalem's records in the U.S. and Canada.

On 27 December 1981, Swedish public broadcaster SVT aired a television special about the band, Rock för Gud ("Rock for God"), filmed live in Växjö, as part of the Söndagskväll strand. Jerusalem also appeared on West German television, performing on the ZDF concert programme Rockpop in Concert (recorded in Dortmund on 19 December 1981 and broadcast on 30 January 1982), alongside German band Spliff.

Jerusalem's English-language releases helped expand the band's international audience. The band later toured in the United States, where they gained exposure within the American Christian rock scene.

In January 1981, Swedish Christian newspaper Dagen reported on the band's growing international profile. According to the article, Jerusalem had performed in France, Belgium, Germany, and England over the preceding year, and the week before publication part of a concert by the band, filmed at a discotheque in Berlin, had been broadcast on German television. Christiansson said Christian musicians had generally struggled to gain mass-media exposure in Germany, making the development encouraging. The article noted the band had been playing together for six years by that point, but that members had only begun working on the band full-time from August 1980. At the time, Jerusalem's records were among the best-selling Christian records in England, and a tour of Spain was being planned for that May or June.

Warrior, MTV, and Can't Stop Us Now (1981–1985) The album Krigsman (Warrior) (1981/1982) is regarded as a significant release in Jerusalem's catalogue and became one of the band's best-known albums internationally. The album was produced by Northern Irish producer Andy Kidd and became Jerusalem's best-selling release, with combined sales of the Swedish and English-language ("Warrior") editions exceeding 100,000 copies. In her review of Krigsman (Warrior) for Dagen, Ulrika Djurfeldt praised the album's genuinely heavy rock sound, noting that it almost sounded as though it had been recorded live. She also singled out the cover art as effectively reinforcing the album's title, and praised the inclusion of full lyrics, though she felt the songs could be difficult to fully grasp without some familiarity with the Bible and Christian idiom. She particularly highlighted the twelve-minute track "Sodom," which likens Sweden to the sinful biblical city, and "It's Mad," which she described as a modern retelling of the story of the walls of Jericho.

Following the release of the English-language version of Warrior, Jerusalem gained further international exposure when their video for the song "It's Mad" was scheduled for broadcast on MTV in 1982 (before both DeGarmo & Key and Stryper). Billboard described the appearance as "the first break for 'gospel rock' on MTV", noting that the channel accepted the video based on its quality rather than the band's Christian identity. Jerusalem were also billed to appear at the Greenbelt festival's 10th-anniversary event in 1983, held that year at Knebworth Park, Hertfordshire.

Jerusalem's fourth album, Vi Kan Inte Stoppas (Can't Stop Us Now) (1983), included a stylistic change to a more melodic rock sound with less overtly God-centered lyrics. A 1983 profile in the Swedish magazine Okej described the change in direction on Vi Kan Inte Stoppas and its lead single "Let's Go Dancing" as a deliberate stylistic evolution rather than a departure from the band's faith; Christiansson said Jerusalem remained free of the "Christian hard rock" label abroad even as it drew scrutiny at home.<ref name="okej1983"> </ref> The same article noted the band's continued international touring, including an appearance at Wembley in London on 12 October 1983 that was broadcast on British television the following January, and a forthcoming 45-day tour of the United States, Canada, South Africa and New Zealand. An early-1985 follow-up feature in OKEJ, headlined "Jerusalem – the group that's bigger abroad than at home", reported that Vi Kan Inte Stoppas had by then sold more than 30,000 copies in Sweden, and bassist Peter Carlsohn discussed the band's growing audiences on successive US tours. At the time, the band was preparing to enter the studio that March to record its fifth album ahead of a planned three-month US tour.<ref name="okej1985"/>

A February 1985 profile of Stryper in Christianity Today cited Jerusalem alongside Petra, Rez Band, and Barnabas as Christian rock acts that had largely failed to sell albums or concert tickets to audiences outside the church, according to Refuge Records president Ray Nenow, who said the industry's distribution infrastructure simply was not built to get such records into secular stores.