How to make a roof with 3 columns

Is it possible to make a roof with 3 columns. How do you do it?

Of course
You can arrange the 3 in a triangle and run beams between them and joists over the beams.
You can arrange the 3 in a line, put symmetrical beams off each column (and add guy supports from above the roof line by making the columns taller) and then connect the beams between the posts and between the ends of the beams and then run joists over the top of the beams.
You can put the 3 in a line and hoist a 3 ring circus tent up them and not put on the side walls.

You can have as many columns as you want.

How? too many unknowns. See a structural engineer when you have all the info you need.

Note that the columns do not have to be structural, they can be decorative only.

.