Religious building.

The school has a rectangular ground plan, with a horizontally elongated central body and two bodies at each end with a vertical layout. The one on the left corresponds to the porter's lodge and the one on the right to the chapel. On the left side there is an annexe that forms a kind of tower with battlements, which served as an observatory.

The opening systems are different, they do not follow any pattern (rectangular, arched, etc.), and opposite this building there is another one used as a storehouse with similar construction characteristics.

The materials used are very varied: stone, red brick, mosaic, stained glass and iron.

Josep Puig i Cuyer, born in Breda, spent his summer holidays in Sant Julià de Vilatorta and, with the desire to carry out charitable work, had the orphan school built, which was inaugurated in 1894.

Three years later, a meteorological observatory was installed, which was the first in the region. An interesting natural science museum was also created. These two tasks were carried out by Father Cazador.

In 1958, a fire destroyed the museum and the library.

In 1972, the internal structure of the school was partially modified.

Roser School is a Catalan Art Nouveau style building, made up of different rectangular bodies: an elongated central body and two lateral bodies with a vertical layout.
The façades are masonry with ornamentation in a variety of materials (stone, red brick, iron, ceramic mosaic and stained glass).
On the left-hand side there is the school porter's lodge, and on the right-hand side the chapel.
Attached to the left wing there is a kind of tower topped with battlements. In front of this building there is another one with similar characteristics, which is used as a storehouse.
As for the openings, they do not follow any pattern and use a variety of forms and systems.
The Orphan School was inaugurated in 1897 and was designed by the architect Manuel Vega i March. It was built thanks to the charitable work of Josep Puig i Cunyer, managed by his brother-in-law Francisco de Paula Benessat.
The congregation of the order of the Sons of the Holy Family, founded by Father Manyanet in 1864, ran the school.

Josep Puig i Cunyer conceived the idea of building a farm school for poor orphans, providing the necessary financial resources.
His brother-in-law, Francesc de Paula Benessat Folch, who was the one who materialised his plan, commissioned the architect Manuel Vega i March (1871-1931) to design the building and entrusted the direction of the school's education to the Order of the Sons of the Holy Family. Finally, in 1894, the Orphan School was inaugurated.
One of these educators, Father Manuel Cazador i López, set up a meteorological observatory and, some time later, a natural science museum.
The building of the Orphan School facilitated the construction of avenues and streets in the northern part of the municipality, which was occupied by country houses and villas with large gardens – the result of Sant Julià de Vilatorta's tradition as a summer resort during the 19th century.
In 1958, a fire destroyed part of the school premises, but former pupil Conrat Vilarrubia managed to save some pieces from the museum and some data from the meteorological observatory.
Finally, in 1972, the school underwent renovation work, which partially modified its internal structure.