Equatorial room

It is usually referred to in observatory buildings that contain more than one type of instrument: for example buildings with an "equatorial room" containing an equatorial telescope and a "transit room" containing a transit telescope.

[1] Equatorial rooms tend to be large circular rooms to accommodate all the range of motion of a long telescope on an equatorial mount and are usually topped with a dome to keep out the weather.

In some cases an observatory would move to a new location, or the equatorial telescope itself would be removed.

These peculiar rooms can sometimes be found in buildings at old colleges and towns, with their former use long forgotten.

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