в четырёх стенах(в пределах четырёх стен: We all know that learning takes place experientially in every corner of our environment, but yet tend to support it only within the confines of four walls.learnlife.comVLZ_58)
на территории города(Fewer UK hits. It is the responsibility of the council to deal with, and provide, an abandoned vehicle service within the confines of the city of Salford. | The successful applicants will enroll as doctoral students at the University of Edinburgh, but need not reside within the confines of the City of Edinburgh. Alexander Demidov)