Nydia Han at the "Ball on the Square"

RITTENHOUSE SQUARE (WPVI) -- Rittenhouse square was transformed into a ballroom Thursday night.

This is the 33rd annual "Ball on the Square", which raises money for renovations and improvements to the park.

Our own Nydia Han was among the more than 500 people attending this black tie gala, which was hosted by the Friends of Rittenhouse Square.