The phrase "central dome" refers to a structure that is on top or in the center of a building. It is usually rounded and can often be seen in important buildings like churches, mosques, or government buildings. Full definition
The most striking exterior feature is the large central dome covered with brilliantly colored tiles and capped with a small copper cupola. (en.wikipedia.org)
The sculpted hood features a wider central dome and the headlights, too, are larger than before. (carwale.com)
The structure is one large pyramid-esque square with nine stacked platforms and a top central dome. (adventureinyou.com)