Centerpiece (noun)

1. An object, arrangement of flowers, or work of art placed in the middle of a table as a decoration or focal point.
2. The most important or prominent feature or item in a scheme or design.

Origin:

Late 16th century, from center + piece.

Examples:

1. A beautiful vase of flowers was the centerpiece of the dining table.
2. The centerpiece of the museum exhibit was a large sculpture.
3. The centerpiece of the wedding was a magnificent cake.
4. The centerpiece of the garden was a magnificent fountain.
5. A chandelier was the centerpiece of the grand ballroom.