Following Teboho's general rule of "complain on the forum and it shall arrive"... I found the Gates of Amun. I just had to realize that the architecture was not of the traditional gates (with only 2 open sides like the Gates of Dendur), but had substantial Roman influence in the form of columns and 4 open sides.
It is the Arch of Septimus Severus in Libya, commissioned by the Libya-born roman emperor. (https://en.wikipedia.org/wiki/Arch_of_Septimius_Severus_(Leptis_Magna))
It is the Arch of Septimus Severus in Libya, commissioned by the Libya-born roman emperor. (https://en.wikipedia.org/wiki/Arch_of_Septimius_Severus_(Leptis_Magna))