This visualization gallery demonstrates a progression of chart types, starting with a first chart that uses color and size encodings to represent data dimensions. It then presents a grouped bar chart and a stacked bar chart to compare categorical data and part-to-whole relationships. The collection concludes with a stacked area chart and a multi-line chart for showing trends over time. The example is built with simple HTML pages that link to static PNG images, relying on standard web technologies rather than a JavaScript visualization library.