The organization takes its name from Robert Baden-Powell, whose initiatives in Britain in starting in 1907 launched the international Scouting movement.
Lord Baden-Powell's own scout hat along with medals from his military career and the Union Flag flown at the original Brownsea Island camp will also be part of the exhibition.
Australia-based Michael Baden-Powell, who has been involved with Scouting for more than 50 years, told Radio 4's PM programme that "belief in a higher being" remained at the "core of the movement".