Before the metronome, composers marked tempo with Italian words describing a feeling rather than a number. Those markings are still printed on almost every score. The BPM ranges below are the modern convention — useful, but never absolute.
A marking also implies character, not only speed: Grave is heavy, Allegro is cheerful, Vivace is lively. Two pieces at the same BPM can carry different markings.
Measure a tempo instead
If you have a recording rather than a score, tap along with it and read the BPM directly.