Jengki was an eccentric architectural style developed in Indonesia in the 1950s following its independence.
The style reflected the novel influence of the United States on Indonesian architecture after hundreds years of the Dutch colonial rule. This influence was possibly brought through American teachers working at the Department of Architecture at Bandung Institute of Technology in the mid-1950s, and the name 'Jengki' itself is thought to derive from the Indonesian phonetic pronunciation and spelling of the word 'Yankee'.
In this new style, the modernist strict cubic geometric forms that the Dutch had used before World War II were transformed into more unusual shapes, such as pentagons. Asymmetrical roofs and facades, playful cut-out doors and windows, and oddly tilted roofs and eaves were imbued with a spirit of cheerfulness and freedom. The surface and composition were festive – characteristics that were not commonly found elsewhere in Europe and America at the time. They were associated with an expression of the political spirit of freedom among the Indonesians. Frances Affandi, the executive director of the Bandung Heritage Society, says that the structures are "... charming and noteworthy, but underresearched, underdocumented and underappreciated.”