It's about as long as a Giant Tortoise's Lifespan.
In other words, the length of a Giant Tortoise's Lifespan is 1 times 246 years.(for Adwaita, an Aldabra Giant Tortoise) (Dipsochelys dussumieri, formerly Geochelone gigantea)
It's about three times as long as Pepi II's reign.
In other words, the length of Pepi II's reign is 0.3 times 246 years.(a.k.a. Neferkare) (2278 BCE - 2184 BCE)
The sixth dynasty pharaoh of Egypt's Old Kingdom, Pepi II Neferkare ascended to the throne at the age of six and is generally thought to have reigned until his death at the age of one-hundred — a total of 94 years. His reign was the longest of any monarch in history.
It's about eight times as long as Pius IX's reign.
In other words, 246 years is 7.773 times the length of Pius IX's reign, and the length of Pius IX's reign is 0.1287 times that amount.(a.k.a. Pope Blessed Pius IX, a.k.a. Giovanni Maria Mastai-Ferretti) (1792-1878)
It's about twenty-and-a-half times as long as FDR's Presidential Term.
In other words, 246 years is 20.32 times the length of FDR's Presidential Term, and the length of FDR's Presidential Term is 0.04921 times that amount.(a.k.a. Franklin Roosevelt, a.k.a. Franklin Delano Roosevelt) (1933-45)
FDR, the 32nd President of the United States, served from March 4th, 1933 to April 12th, 1945, dying after 12.11 years in office. At the time of his sudden death, Elizabeth Shoumatoff was painting a portrait of Roosevelt which, never finished, now hangs in a museum at the site of Roosevelt's Presidential retreat in Georgia.
It's about thirty times as long as The Revolutionary War (American).
In other words, 246 years is 29.36 times the length of The Revolutionary War (American), and the length of The Revolutionary War (American) is 0.03406 times that amount.(a.k.a. American War of Independence) (1775-83)
The War between Great Britain and the its thirteen colonies in North America (now the United States) for the independence of the United States is generally considered to have started with the Battle of Lexington and Concord on April 18th, 1775 (sometimes known as "The Shot Heard 'round the World") and to have concluded with the signing of the Treaty of Paris on September 3rd, 1783 — 8.378 years. A total of 25,000 Americans are estimated to have died as a result of the war.
It's about thirty times as long as King Tut's reign.
In other words, the length of King Tut's reign is 0.03 times 246 years.(a.k.a. Tutankhamun, a.k.a. Tutankhaten, a.k.a. tVwa:t-ʕa:nəx-ʔaˡma:n) (1333 BCE - 1324 BCE)
It's about forty times as long as The Construction of the Chunnel.
In other words, 246 years is 38.51 times the length of The Construction of the Chunnel, and the length of The Construction of the Chunnel is 0.02597 times that amount.(a.k.a. Channel Tunnel, a.k.a. Le tunnel sous la Manche) (1987 thru 1994) (Folkstone, Kent, UK to Coquelles, Pas-de-Calais, France)
The construction crew of the Chunnel broke ground in England on December 15th, 1987 and the tunnel was inaugurated by the Queen of England and the President of France on May 6th, 1994 — a total construction time of 6.382 years. The 4.9 million cubic meters of chalk excavated from the UK side of the Chunnel was dumped within sea walls to create the 299,467.38 sq. km (74 acre) Samphire Hoe County Park near Dover, Kent.