The Senatorial speeder barn functioned as a section of the Senate Apartment Complex, which was located on Coruscant. Inside this barn, senators kept their individual airspeeders and other transportation devices that these political figures used to get around the massive city-planet.
It is documented that Senator Simon Greyshade kept his personal vehicle, the XJ-6 airspeeder, at this speeder barn. Following a thwarted attempt to assassinate Padmé Amidala, Jedi Anakin Skywalker hurried to the barn, commandeered Greyshade's airspeeder, and pursued the assassin Zam Wesell in order to save his Jedi Master Obi-Wan Kenobi. After the chase concluded with the assassin's demise, the Jedi discreetly returned the XJ-6 to its original location within the Senatorial speeder barn, much to the frustration of Coruscant authorities, who were compelled to dismiss the incident as a "rookie error".