Dekalog (pronounced [dɛˈkalɔk], also known as Dekalog: The Ten Commandments and The Decalogue) is a 1989 Polish drama television miniseries directed by Krzysztof Kieślowski and co-written by Kieślowski with Krzysztof Piesiewicz, with music by Zbigniew Preisner. It consists of ten one-hour films, inspired by the decalogue of the Ten Commandments. Each installment explores characters facing one or several moral or ethical dilemmas as they reside in an austere housing project in 1980s Poland.

Exhibited in its entirety at the 46th Venice International Film Festival, the series, Kieślowski's most acclaimed work, was said in 2002 to be "the best dramatic work ever done specifically for television" and has won numerous international awards, though it did not receive wide release outside Europe until the late 1990s. It is one of fifteen films listed in the category "Values" on the Vatican film list. In 1991, filmmaker Stanley Kubrick wrote an admiring foreword to the published screenplay, wherein he stated that Dekalog was the only film masterpiece he could think of.

The series was conceived when screenwriter Krzysztof Piesiewicz, who had seen a 15th-century artwork illustrating the Commandments in scenes from that time period, suggested the idea of a modern equivalent. Filmmaker Krzysztof Kieślowski was interested in the philosophical challenge, and also wanted to use the series as a portrait of the hardships of Polish society, while deliberately avoiding the political issues he had depicted in earlier films. He originally meant to hire ten different directors, but decided to direct the films himself. He used a different cinematographer for each episode except III and IX, in both of which Piotr Sobociński was director of photography.

The large cast includes both famous and unknown actors, many of whom Kieślowski also used in his other films. Typically for Kieślowski, the tone of most of the films is melancholic, except for the final one, which is a black comedy, featuring two of the same actors, Jerzy Stuhr and Zbigniew Zamachowski, as in Three Colors: White.^{[citation needed]}

The ten films are titled simply by number, e.g. Dekalog: One. According to film critic Roger Ebert's introduction to the DVD set, Kieślowski said that the films did not correspond exactly to the commandments, and never used their names himself. Though each film is independent, most of them share the same setting in Warsaw, and some of the characters are acquainted with each other. Each short film explores characters facing one or several moral or ethical dilemmas as they live in a large housing project in 1980s Poland. The themes can be interpreted in many different ways; however, each film has its own literality:

A nameless character played by Polish actor Artur Barciś appears in all but episodes 7 and 10. He observes the main characters at key moments, and never intervenes.

Milk is a recurring element in the following seven episodes:

Metacritic, which uses a weighted average, assigned the film a score of 100 out of 100, based on 13 critics, indicating "universal acclaim". It won the 1991 BAFTA TV Award for Best International Programme and the Bodil Award for Best European Film. The film also won the Best Foreign Film award from French Syndicate of Cinema Critics.