The Itmad-ud-Daula, often referred to as the 'Baby Taj', is a beautiful Mughal mausoleum located in Agra, India. It is known for its intricate marble inlay work and stunning architecture, serving as a precursor to the Taj Mahal. The monument is often praised for its exquisite gardens and detailed craftsmanship that offer a glimpse into Mughal architectural brilliance.