Pageantry, n.
Scenic shows or spectacles, taken collectivelly; spectacular guality; splendor. Such pageantry be to the people shown. Dryden. The pageantry of festival. J. A. Symonds.
Syn. -- Pomp; parade; show; display; spectacle.
Shades of meaning
Fernald has no entry of its own for pageantry; he lists it under ostentation.
Where he writes about it:
Pageant, pageantry, parade, and pomp refer principally to affairs of arms or state; as, a royal pageant; a military parade. — from ostentation
Pageant and pageantry are inferior to pomp, denoting spectacular display designed to impress the public mind, and since the multitude is largely ignorant and thoughtless, the words pageant and pageantry have a suggestion of the transient and unsubstantial. — from ostentation