"square hall" is a correct and usable phrase in written English.
It can be used to describe a hall or room that is in the shape of a square. Example: The hotel's conference room is a spacious square hall, perfect for hosting meetings and events.
The Telestrion hall, where the Eleusinian Mysteries were performed, was a square hall with rock-cut seats.
As is customary, we removed our shoes before entering the temple, a square hall with polished black-granite statues of various gods standing in shrines all around.
Buildings dating from the time of the Seljuq sultans include the Jāmiʿ Masjid (Friday Mosque); the Madrasah Haidariye, a square hall surmounted by a cupola; the tomb of Mostowfi, the Persian traveler; and the mosque of the shah.
Three metal electrodes of length (L=1~mbox{mm}) are capacitively coupled to a square Hall bar.
Behind it is a square hall in which four columns support a central unusually shaped dome.
The Hall of Central Peace is a smaller, square hall, used by the Emperor to prepare and rest before and during ceremonies.
The entrance to the house is on the corner, leading to a circular lobby and a square entrance hall, which is top-lit by a dome with a lantern.
Trying to find the way out took 18 years, during which I went to playschool, in the square church hall, then primary and secondary schools, in square brown buildings, and caught a million buses through the estate.
After the renovation, the front entrance opened onto a square entrance hall.
ComplexCon rolled out for its first ever weekend expo on November 5-6 in the Long Beach Convention Center's 200,000+ square feet hall.
Thinc Design developed the concept as to how to display and appreciate such a vast collection of quilts in the 55,000 square foot hall.
