Old this certainly is .. dating back to 1784. This 60ft tall Rumi Darwaza was built by Nawab Asaf-Ud-Daulah as an entrance to the city. It was modelled on Istanbul's Sublime Porte.
In fact most of Lucknow's monuments were made under the reign of this nawab. From what little I've read of him he had little more to his credit than the beautification of Lucknow and his generosity that bordered on the eccentric.
The monuments sure are beautiful and when you're as rich and spoilt as the nawabs are believed to be, some eccentricity is in order.
Linking to Thursday Challenge : "MONOCHROME" (Black and White, Sepia, Old Looking,...)