Theology is the eighth full-length album by Irish singer Sinéad O'Connor. It was released in 2007 on Rubyworks (and Koch Records in the US). The album consists of two discs, the acoustic "Dublin Sessions" and the full-band "London Sessions".

The first single from Theology is "I Don't Know How to Love Him" (an Andrew Lloyd Webber and Tim Rice song from Jesus Christ Superstar). In the issue dated 14 July 2007, the album entered the US Billboard 200 chart at number 168. The album also debuted in the top 20 of Billboard's Independent Albums list at number 15. First-week sales of the album in the US amounted to 4,700 units, while the record also charted in Ireland, France and Italy.

The album sold 375,000 copies worldwide.

The exclusive edition sold at Best Buy stores in the United States includes five additional live tracks, recorded at Dublin's Sugar Club on 8 November 2006. Two of these, "Something Beautiful" and "If You Had a Vineyard," were made available for download on O'Connor's MySpace page in early 2007.

The Borders-exclusive edition includes three interviews.

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