If you look at the hotel around jaipur city, there are many of hotel that have interesting architecture building. For Jaipur i think the one that can be your choice to stay is Umaid Bhawan Hotel.
What i like about this hotel is the look, full of colour and classical shape of maharaj building. They paint the wall realy perfectly with some of god and goddes picture around. The room just standard nothing special. The Rooftop restaurant is nice, with good food and bright light.
This hotel is in quiet area of jaipur, and bit far from everything. But recomended for who that want escape for the crowd of jaipur.
The Address :
D1-2A,Behind Collectorate, (Via) Bank Road, Bani Park, Jaipur-302016