A lady chapel is a special room in a church where people can go to say prayers and show love and respect to Mary, the mother of Jesus. It's called a "lady" chapel because Mary is also known as the "Lady" or "Queen" of Heaven. The chapel is usually decorated with special statues, paintings, and candles that remind people of Mary and her important role in history. Lady chapels can be found in many different kinds of churches, from big fancy ones to smaller, simpler ones. So, if you ever visit a church, look out for the lady chapel and you might want to say a prayer for Mary.