Queen Elizabeth II passed away on Thursday, September 8.

She died at the age of 96.

She was the longest-reigning monarch in the country’s history.

Three weeks after her death, on Thursday, September 29, her death certificate was made public.

The certificate listed “old age” as her official cause of death.

The time of death was listed at 3:10 PM local time.

She died at Balmoral Castle in Aberdeenshire, Scotland.

The U.K.’s official period of mourning ended on Monday, September 19.

Many world leaders, including POTUS Joe Biden, attended her funeral.