Which chart did Metallica's The Black Album top for four consecutive weeks?

Metallica's The Black Album topped the Billboard 200 for four consecutive weeks.

It was Metallica's first album to reach number one on the US album chart. The record debuted at number one after selling 598,000 copies in its first week, establishing the commercial scale of the band's breakthrough.

The Billboard 200 ranks albums in the United States using measures that include sales and, in later eras, equivalent consumption. In 1991, the chart's album-sales performance showed that Metallica had moved far beyond its underground thrash-metal audience.

The album also debuted at number one in ten countries, but the four-week run specifically refers to the Billboard 200. It should not be confused with the Billboard Hot 100, which is a singles chart and is where “Enter Sandman” reached number 16.