Directions: Read the following passage and answer the question that follows.

In the centre of the Emerald City of Oz, the capital city of Ozma's dominions, is a vast and beautiful garden, surrounded by a wall inlaid with shining emeralds, and in the centre of this garden stands Ozma's Royal Palace, the most splendid building ever constructed. From a hundred towers and domes floated the banners of Oz, which included the Ozmies, the Munchkins, the Gillikins, the Winkies and the Quadlings. The banner of the Munchkins is blue, that of the Winkies yellow; the Gillikin banner is purple, and the Quadling's banner is red.

What was there in the centre of the beautiful garden?