The Pyramid of Cestius is an ancient tomb built for the wealthy Roman, Gaius Cestius, who passed away in 12 BC. This unique monument stands out in Rome with its striking Egyptian-style architecture, a reminder of the city’s fascination with distant cultures during that era.
Entry to the Pyramid of Cestius is possible only through guided tours, which are available on specific dates. Tours are scheduled for the 2nd and 4th Saturday of every month. Additionally, visitors who purchase a ticket to the nearby Museum of Via Ostiense can also join tours on the 1st and 3rd Saturday of each month. This system helps to protect the site while allowing curious travelers to learn about its history and significance.
Source - https://en.wikipedia.org/wiki/Pyramid_of_Cestius