Waclaw Sierpinski (1882-1969) was a Polish mathematician. His work predated Mandelbrot's discovery of fractals. He is probably best known for the Sierpinski triangle, but there are many other Sierpinski-style fractals.

Sierpinski cube
Sierpinski pyramid

Sierpinski square fractal
Sierpinski arrowhead curve
Sierpinski carpet

Sierpinski Platonic solids
Sierpinski coke
Another Sierpinski curve