Lincoln Cathedral, Lincoln Minster, or the Cathedral Church of the Blessed Virgin Mary of Lincoln and sometimes St Mary's Cathedral, in Lincoln, England, is a Grade I listed cathedral and is the seat of the Anglican Bishop of Lincoln. Construction commenced in 1072 and continued in several phases throughout the High Middle Ages. Like many of the medieval cathedrals of England it was built in the Early Gothic style.

Although considered doubtful by some, many historians claim it became the tallest building in the world upon the completion of its 160 metres (520 ft) high central spire in 1311; if so, it was the first building to hold that title after the Great Pyramid of Giza, and held it for 238 years until the spire collapsed in 1548, and was not rebuilt. Had the central spire remained intact, Lincoln Cathedral would have remained the world's tallest structure until the completion of the Washington Monument in 1884. For hundreds of years the cathedral held one of the four remaining copies of the original Magna Carta, now securely displayed in Lincoln Castle. The cathedral is the fourth largest in the UK (in floor area) at around 5,000 square metres (54,000 sq ft), after Liverpool, St Paul's and York Minster. It is highly regarded by architectural scholars; the Victorian writer John Ruskin declared: "I have always held ... that the cathedral of Lincoln is out and out the most precious piece of architecture in the British Isles and roughly speaking worth any two other cathedrals we have."