Houses of the Holy is the fifth studio album by the English rock band Led Zeppelin, released on 28 March 1973 by Atlantic Records. The album benefited from two band members installing studios at home, which allowed them to develop more sophisticated songs and arrangements and expand their musical style. Several songs subsequently became fixtures in the group's live set, including "The Song Remains the Same", "The Rain Song" and "No Quarter". Other material recorded at the sessions, including the title track, was shelved and released on the later albums Physical Graffiti (1975) and Coda (1982). All instruments and vocals were provided by the band members Robert Plant (vocals), Jimmy Page (guitar), John Paul Jones (bass, keyboards), and John Bonham (drums). The album was produced by Page and mixed by Eddie Kramer. The cover was the first for the band to be designed by Hipgnosis and was based on a photograph taken at Giant's Causeway in Northern Ireland.

Although critical response was mixed, Houses of the Holy became a commercial success, later receiving a Diamond certification by the Recording Industry Association of America (RIAA) in 1999 for at least 10 million copies sold in the US. In 2020, the album was ranked at number 278 on Rolling Stone's 2020 list of the "500 Greatest Albums of All Time".