All 3 Uses of

pinnacle
in
The Hunchback of Notre Dame

That settled, the number of chapels, doors, bell towers, and pinnacles are modified to infinity, according to the fancy of the century, the people, and art.†
Chpt 1.3.1 *

For the spectator who arrived, panting, upon that pinnacle, it was first a dazzling confusing view of roofs, chimneys, streets, bridges, places, spires, bell towers.†
Chpt 1.3.2

The churches (and they were numerous and splendid in the University, and they were graded there also in all the ages of architecture, from the round arches of Saint-Julian to the pointed arches of Saint-Séverin), the churches dominated the whole; and, like one harmony more in this mass of harmonies, they pierced in quick succession the multiple open work of the gables with slashed spires, with open-work bell towers, with slender pinnacles, whose line was also only a magnificent exaggeration of the acute angle of the roofs.†
Chpt 1.3.2

Definition:

the highest point -- either literally, like the top of a mountain, or figuratively, like the peak of success or achievement