The Challenge Cup is one of the longest-running competitions in world sport, having been first contested in 1896-97, shortly after the breakaway from the Rugby Football Union.
Ahead of Saturday's Wembley final between St Helens and Warrington, PA Rugby League Correspondent Ian Laybourn takes a look at the famous tournament in numbers.
1 - This will be the first meeting between these two clubs in a major final. The last time they met in a final was in 1982, when St Helens won 16-0 in the Lancashire Cup at Wigan's Central Park.
3 - Hooker James Roby is the only St Helens player with previous Challenge Cup final experience, having been in the team that won the trophy three times in a row from 2006-08.
8 - Warrington have won eight of their 18 Challenge Cup finals and are hoping to avoid a third successive defeat.
10 - Of the last 10 meetings in Super League, Saints have won seven, Warrington just three.
14 - Warrington have 14 survivors from last year's 20-14 defeat by Catalans Dragons. Half-backs Kevin Brown and Tyrone Roberts and forward George King are the only ones missing.
16 - The number of times the teams have met in the Challenge Cup, including five semi-finals, but of course their 17th will be the first in the final.
21 - Only Wigan and Leeds have appeared in more Challenge Cup finals than St Helens, who made the first of 21 appearances in the inaugural final in 1897. They have won 12 and lost nine.
1895 - The Challenge Cup final will be followed by the final of the inaugural 1895 Cup, named to mark the year of the game's founding, between two former Super League clubs, Widnes and Sheffield Eagles.