This very interesting article, which explain carefully this wonderful architecture, is also mentioning my work on the orientation of the Gardens of Taj. The Gardens have the "Charbagh" design, which represents the Garden of Paradise.
"In that regard, if one positions himself in the north-central position of the Charbagh within the water-body intersected by the paths and then look towards the north-east side pavilion on June 21st (summer solstice – when the sun is at its highest point), he could see the sun rise directly over that particular section. And now, if the viewer remains in his position, the sun will move from behind him, and ultimately set behind the section of the north-west pavilion. In essence, the sun’s path will define the entire purview of the Taj Mahal starting from one of the pavilions, then the minarets, the mausoleum and finally the other pavilion. There are also additional alignments that match up with the sun’s path and the monument’s gardens. And quite interestingly, Sparavigna has also found similar alignment aspects in a range of other Mughal architectural specimens, including the Dilkusha Charbagh, Charbagh of Akbar and Humayun’s Tomb."
This is what Dattatreya Mandal, bachelor's degree in Architecture (and associated History of Architecture), writes in https://www.realmofhistory.com/2018/11/07/facts-taj-mahal-mughal-indian/
Dattatreya Mandal is founder/editor of Realmofhistory.com
