While there he began planning the design and construction of a suitable mausoleum and funerary garden in LOCATION@1 for his wife , a task that would take more than NUMBER@1 years to complete , the Taj Mahal .

While there he began planning the design and construction of a suitable mausoleum , a kind of tomb , and a garden in LOCATION@1 for his wife , a task that would take more than NUMBER@2 years to complete , the Taj Mahal .
