This is sort of a religious structure. The Taj Mahal is actually a mausoleum built by Shah Jahan in memory of his third wife, Mumtaz Mahal, in 1632, as a symbol of eternal love (I wonder how the first and second wives felt about this). The architecture is an islamic style and verses from the Qur'an form part of the decoration. The gardens around the main building reflect a mystic Islamic view of paradise.
A month ago Mariann Asanuma posted a birthday cake topper she made for an AFOL building the Taj Mahal. I love the scale mixing here.
More on microscale building at MicroBricks. More on miniland scale building at MinilandBricks.