The Hungarian architect Ignaz Alpar, specialized in school buildings, designed the high-Renaissance school building as an elongated three-story L-floor plan, with three façades: two facing Pomerio Street and Studentska Street. The fracture of the corpus at an angle formed the inner courtyard with a car entrance on the southern façade. With its elongated dimensions, the building looks monumentally located on a slightly sloping terrain, so the height of the building on the west façade is three and on the east two storeys. Each façade is perceived as a separate body even though they are connected in the same block. The walls of the ground floor and first floor are marked with rough rustic work and the upper floors are smoothly plastered with slightly rustic accentuated edges of the central avant-corps and corners of the building. On the shorter, western façade there is the central portal of the main entrance, accentuated by broken arched lintels of two third-floor windows with a cartouche in the middle for the state coat of arms. All the window frames of the upper floors are accentuated by prominent window sills and occasional vegetable decoration. Like all schools in Rijeka under Hungarian administration, it was equipped with modern educational principles, equipment, classrooms, and large, mostly south-oriented classrooms.