There were five in 1871, with three more added between 1907 and 1913.

A field house was added between the stadium and the back of the school in the 1940s.

The last major extension was added between 1658 and 1661.

Two wings were added between 1865 and 1872, at which time it became the city hall.

Residential homes were added between the 1960s to the north and the 1970s to the east.

The school has recently expanded, with a new building being added between the two older buildings.

A 2 1/2-story stone wing was added between 1817 and 1835.

A number of attached wings were added between 1836 and 1926.

A passing loop was added between the two a few years later.

The conservatory added between 1870 and 1880 is of special interest.