What are some ways to decorate an old ceramic flowerpot?

Hi Karol, here is a link to some pretty ways to decorate them.

https://www.countryliving.com/diy-crafts/g4124/diy-pretty-flower-pot-ideas/

Paint it or mosaic it with broken up pieces of a ceramic plate. You can also use a decorative stoneware plate. How about using decorative duct tape making a design on your flower pot. The Sky is the limit.

Hi there, I've always been a fan of painted, stenciled or pots embellished with transfers like this one: https://www.hometalk.com/diy/build/planters/vintage-inspired-flower-pots-7946703

Vintage Inspired Flower Pots

Take Mod Podge, and some scraps of favorite fabrics, and glue onto the pot. You can use fabric that closely matches or complements decor in home. Pretty pots!