centrepiece

• centerpiece (US)
• centre-piece

From centre +‎ piece.

centrepiece (plural centrepieces) (British spelling, Canadian spelling)

1. An ornament to be placed in the centre, as of a table, ceiling, etc.
2. A central article or figure.
   • 1960 December, Voyageur, “The Mountain Railways of the Bernese Oberland”, in Trains Illustrated, page 752:

     Below is the deep abyss of the Lauterbrunnen valley, and at its head a stately semi-circle of mountains, with the pyramidal Lauterbrunnen Breithorn as the centre-piece.

   • 2020 May 20, Philip Haigh, “Ribblehead: at the heart of the S&C's survival and its revival”, in Rail, page 26:

     Bridge SAC66 has its place in railway history as the centrepiece of the battle to save the Settle-Carlisle Line from closure in the 1980s.
     For SAC66 is better known as Batty Moss (or Ribblehead) Viaduct - the magnificent, Grade 2-listed, 24-arch structure that strides over the pockmarked ground between Ribblehead station and Blea Moor signal box.

• centerpiece