RectangleChart

RectangleChart[{{x1,y1},{x2,y2},…}] makes a rectangle chart with bars of width xi and height yi. 

RectangleChart[{…,wi[{xi,yi},…],…,wj[{xi,yj},…],…}] makes a rectangle chart with bar features defined by the symbolic wrappers wk.

RectangleChart[{data1,data2,…}] makes a rectangle chart from multiple datasets datai. 

Please visit the official Wolfram Language Reference for more details and examples on core symbols.