They were called "sackbuts," and had a distinctive bell shape and elaborate decorations. Andrea and Giovanni Gabrielli wrote many polyphonal compositions using the sackbutt and "cornets" for history's first "stereo-"
And "quadraphonic" performances.
https://en.wikipedia.org/wiki/Andrea_Gabrieli?wprov=sfti1
https://en.wikipedia.org/wiki/Giovanni_Gabrieli?wprov=sfti1