Short answers, pulled from the story.
Construction of the Akbari Sarai began in the mid 1550s while Islam Shah Suri ruled the region. The mosque within the complex dates from that earlier Suri period before cells and gateways were added during the mid 1600s under Shah Jahan.
The red sandstone structure covers 12 acres with measurements reaching 797 feet by 610 feet across the entire site. Rows of 180 cells known as khanaha flank the raised terrace on all sides while tower chambers at the corners feature elliptical halls with verandas.
Travelers once found free bedsteads, hot water, cold water, and fodder for animals within these walls alongside a physician and resident baker. Eighteen cells stored luggage weapons and gear carried by visitors to nearby tombs while the site functioned as both a station for wayfarers and a mail station called dāk chowkī.
UNESCO inscribed the Akbari Sarai on its tentative list of World Heritage Sites in 1993. This recognition included the Tombs of Jahangir and Asif Khan alongside the sarai itself to preserve the cohesive architectural ensemble within Shahdara Bagh.
The main arch serves as a portal to the Tomb of Jahangir with a double storied iwan located to the east of the complex. The tomb of Asif Khan sits west of the sarai while the building originally served caretakers of the Tomb of Jahangir as well as passing travelers.