This example presents a stacked bar chart of population by religion across countries, using a dark-themed visualization to improve readability. The chart is built with the Vega-Lite API, which programmatically constructs the specification, while D3.js handles CSV data loading from a remote source. The visualization renders through Vega and Vega-Lite, with a tooltip handler for interactive population details. The chart resizes to fit the browser window, and the color encoding distinguishes religious affiliations.