diff --git a/components/fpspreadsheet/examples/other/chart/write_chart_demo.lpr b/components/fpspreadsheet/examples/other/chart/write_chart_demo.lpr
index 5dc2a3749..14a0fae72 100644
--- a/components/fpspreadsheet/examples/other/chart/write_chart_demo.lpr
+++ b/components/fpspreadsheet/examples/other/chart/write_chart_demo.lpr
@@ -5,7 +5,7 @@ program write_chart_demo;
 uses
   SysUtils, fpspreadsheet, fpstypes, fpschart, xlsxooxml, fpsopendocument;
 const
-  SERIES_CLASS: TsChartSeriesClass = TsScatterSeries;
+  SERIES_CLASS: TsChartSeriesClass = TsBubbleSeries; //TsScatterSeries;
   r1 = 1;
   r2 = 8;
 var
@@ -21,18 +21,21 @@ begin
     sheet1 := b.AddWorksheet('test1');
     sheet1.WriteText(0, 1, '1+sin(x)');
     sheet1.WriteText(0, 2, '1+sin(x/2)');
+    sheet1.WriteText(0, 3, 'Bubble');
     for i := r1 to r2-1 do
     begin
       sheet1.WriteNumber(i, 0, i-1);
       sheet1.WriteNumber(i, 1, 1+sin(i-1));
       sheet1.WriteNumber(i, 2, 1+sin((i-1)/2));
+      sheet1.WriteNumber(i, 3, i*i);   // Bubble series radii
     end;
     sheet1.WriteNumber(r2, 0, 9);
     sheet1.WriteNumber(r2, 1, 2);
     sheet1.WriteNumber(r2, 2, 2.5);
+    sheet1.WriteNumber(r2, 3, r2*r2);
 
     // Create chart
-    ch := b.AddChart(sheet1, 4, 4, 160, 100);
+    ch := b.AddChart(sheet1, 4, 6, 160, 100);
 
     // Add first series (type depending on SERIES_CLASS)
     ser := SERIES_CLASS.Create(ch);
@@ -47,16 +50,25 @@ begin
       TsLineSeries(ser).ShowSymbols := true;
       TsLineSeries(ser).Symbol := cssCircle;
     end;
+    if (ser is TsBubbleSeries) then
+    begin
+      TsBubbleSeries(ser).SetXRange(r1, 0, r2, 0);
+      TsBubbleSeries(ser).SetYRange(r1, 2, r2, 2);
+      TsBubbleSeries(ser).SetBubbleRange(r1, 3, r2, 3);
+    end;
 
-    // Add second series
-    ser := SERIES_CLASS.Create(ch);
-//    ser := TsBarSeries.Create(ch);
-    ser.SetTitleAddr(0, 2);
-    ser.SetLabelRange(r1, 0, r2, 0);
-    ser.SetXRange(r1, 0, r2, 0);
-    ser.SetYRange(r1, 2, r2, 2);
-    ser.Line.Color := scRed;
-    ser.Fill.FgColor := scRed;
+    if SERIES_CLASS <> TsBubbleSeries then
+    begin
+      // Add second series
+      ser := SERIES_CLASS.Create(ch);
+  //    ser := TsBarSeries.Create(ch);
+      ser.SetTitleAddr(0, 2);
+      ser.SetLabelRange(r1, 0, r2, 0);
+      ser.SetXRange(r1, 0, r2, 0);
+      ser.SetYRange(r1, 2, r2, 2);
+      ser.Line.Color := scRed;
+      ser.Fill.FgColor := scRed;
+    end;
 
     {$IFDEF DARK_MODE}
     ch.Background.FgColor := scBlack;
@@ -71,7 +83,7 @@ begin
     ch.Background.Style := fsSolidFill;
     ch.Border.Style := clsSolid;
     ch.PlotArea.Background.Style := fsSolidFill;
-    //ch.RotatedAxes := true;
+    ch.RotatedAxes := true;
     ch.StackMode := csmStackedPercentage;
     //ch.Interpolation := ciCubicSpline;
 
diff --git a/components/fpspreadsheet/source/common/fpschart.pas b/components/fpspreadsheet/source/common/fpschart.pas
index c7cf1cb9a..97a840be8 100644
--- a/components/fpspreadsheet/source/common/fpschart.pas
+++ b/components/fpspreadsheet/source/common/fpschart.pas
@@ -111,7 +111,7 @@ type
   end;
 
   TsChartAxisPosition = (capStart, capEnd, capValue);
-  TsChartType = (ctEmpty, ctBar, ctLine, ctArea, ctBarLine, ctScatter);
+  TsChartType = (ctEmpty, ctBar, ctLine, ctArea, ctBarLine, ctScatter, ctBubble);
 
   TsChartAxis = class(TsChartFillElement)
   private
@@ -239,6 +239,15 @@ type
     constructor Create(AChart: TsChart); override;
   end;
 
+  TsBubbleSeries = class(TsChartSeries)
+  private
+    FBubbleRange: TsCellRange;
+  public
+    constructor Create(AChart: TsChart); override;
+    procedure SetBubbleRange(ARow1, ACol1, ARow2, ACol2: Cardinal);
+    property BubbleRange: TsCellRange read FBubbleRange;
+  end;
+
   TsChartSeriesSymbol = (
     cssRect, cssDiamond, cssTriangle, cssTriangleDown, cssTriangleLeft,
     cssTriangleRight, cssCircle, cssStar, cssX, cssPlus, cssAsterisk
@@ -368,7 +377,7 @@ type
 
     { Connecting line between data points (for line and scatter series) }
     property Interpolation: TsChartInterpolation read FInterpolation write FInterpolation;
-    { x and y axes exchanged (for bar series) }
+    { x and y axes exchanged (mainly for bar series, but works also for scatter and bubble series) }
     property RotatedAxes: Boolean read FRotatedAxes write FRotatedAxes;
     { Stacking of series (for bar and area series ) }
     property StackMode: TsChartStackMode read FStackMode write FStackMode;
@@ -716,6 +725,23 @@ begin
   FChartType := ctBar;
 end;
 
+{ TsBubbleSeries }
+
+constructor TsBubbleSeries.Create(AChart: TsChart);
+begin
+  inherited;
+  FChartType := ctBubble;
+end;
+
+procedure TsBubbleSeries.SetBubbleRange(ARow1, ACol1, ARow2, ACol2: Cardinal);
+begin
+  if (ARow1 <> ARow2) and (ACol1 <> ACol2) then
+    raise Exception.Create('Series bubble values can only be located in a single column or row.');
+  FBubbleRange.Row1 := ARow1;
+  FBubbleRange.Col1 := ACol1;
+  FBubbleRange.Row2 := ARow2;
+  FBubbleRange.Col2 := ACol2;
+end;
 
 { TsLineSeries }
 
diff --git a/components/fpspreadsheet/source/common/fpsopendocument.pas b/components/fpspreadsheet/source/common/fpsopendocument.pas
index 51598d5cd..20f8fbf6e 100644
--- a/components/fpspreadsheet/source/common/fpsopendocument.pas
+++ b/components/fpspreadsheet/source/common/fpsopendocument.pas
@@ -538,7 +538,7 @@ const
   );
 
   CHART_TYPE_NAMES: array[TsChartType] of string = (
-    '', 'bar', 'line', 'area', 'barLine', 'scatter'
+    '', 'bar', 'line', 'area', 'barLine', 'scatter', 'bubble'
   );
 
   CHART_SYMBOL_NAMES: array[TsChartSeriesSymbol] of String = (
@@ -7142,7 +7142,9 @@ var
   sheet: TsWorksheet;
   series: TsChartSeries;
   valuesRange: String;
-  domainRange: String = '';
+  domainRangeX: String = '';
+  domainRangeY: String = '';
+  rangeStr: String = '';
   titleAddr: String;
   count: Integer;
 begin
@@ -7151,10 +7153,10 @@ begin
   series := AChart.Series[ASeriesIndex];
   sheet := TsWorkbook(FWorkbook).GetWorksheetByIndex(AChart.sheetIndex);
 
-  // These are the x values of a scatter plot.
-  if series is TsScatterSeries then
+  // These are the x values of a scatter or bubble plot.
+  if (series is TsScatterSeries) or (series is TsBubbleSeries) then
   begin
-    domainRange := GetSheetCellRangeString_ODS(
+    domainRangeX := GetSheetCellRangeString_ODS(
       sheet.Name, sheet.Name,
       series.XRange.Row1, series.XRange.Col1,
       series.XRange.Row2, series.XRange.Col2,
@@ -7162,20 +7164,37 @@ begin
     );
   end;
 
-  // These are the y values
-  valuesRange := GetSheetCellRangeString_ODS(
-    sheet.Name, sheet.Name,
-    series.YRange.Row1, series.YRange.Col1,
-    series.YRange.Row2, series.YRange.Col2,
-    rfAllRel, false
-  );
+  if series is TsBubbleSeries then
+  begin
+    domainRangeY := GetSheetCellRangeString_ODS(
+      sheet.Name, sheet.Name,
+      series.YRange.Row1, series.YRange.Col1,
+      series.YRange.Row2, series.YRange.Col2,
+      rfAllRel, false
+    );
+    // These are the bubble radii
+    valuesRange := GetSheetCellRangeString_ODS(
+      sheet.Name, sheet.Name,
+      TsBubbleSeries(series).BubbleRange.Row1, TsBubbleSeries(series).BubbleRange.Col1,
+      TsBubbleSeries(series).BubbleRange.Row2, TsBubbleSeries(series).BubbleRange.Col2,
+      rfAllRel, false
+    );
+  end else
+    // These are the y values of the non-bubble series
+    valuesRange := GetSheetCellRangeString_ODS(
+      sheet.Name, sheet.Name,
+      series.YRange.Row1, series.YRange.Col1,
+      series.YRange.Row2, series.YRange.Col2,
+      rfAllRel, false
+    );
 
   // And these are the data point labels.
   titleAddr := GetSheetCellRangeString_ODS(
     sheet.Name, sheet.Name,
     series.TitleAddr.Row, series.TitleAddr.Col,
     series.TitleAddr.Row, series.TitleAddr.Col,
-    rfAllRel, false);
+    rfAllRel, false
+  );
   count := series.YRange.Row2 - series.YRange.Row1 + 1;
 
   // Store the series properties
@@ -7186,11 +7205,17 @@ begin
                'chart:class="chart:%s">' + LE,
     [ AStyleID, valuesRange, titleAddr, CHART_TYPE_NAMES[series.ChartType] ]
   ));
-  if domainRange <> '' then
+  if domainRangeY <> '' then
     AppendToStream(AChartStream, Format(
       indent + '<chart:domain table:cell-range-address="%s"/>' + LE,
-      [ domainRange ]
+      [ domainRangeY ]
     ));
+  if domainRangeX <> '' then
+    AppendToStream(AChartStream, Format(
+      indent + '<chart:domain table:cell-range-address="%s"/>' + LE,
+      [ domainRangeX ]
+    ));
+
   AppendToStream(AChartStream, Format(
     indent + '  <chart:data-point chart:repeated="%d"/>' + LE,
     [ count ]
@@ -7478,7 +7503,7 @@ begin
   end;
 
   Result := Format(
-    indent + '  <style:style style:name="ch%d" style:family="chart">' + LE +
+    indent + '  <style:style style:name="ch%d" style:family="chart">', [ AStyleID ]) + LE +
     indent + '    <style:chart-properties ' +
                    interpolationStr +
                    verticalStr +
@@ -7489,9 +7514,7 @@ begin
                    'chart:auto-size="true" ' +
                    'chart:treat-empty-cells="leave-gap" ' +
                    'chart:right-angled-axes="true"/>' + LE +
-    indent + '  </style:style>' + LE,
-    [ AStyleID ]
-  );
+    indent + '  </style:style>' + LE;
 end;
 
 { <style:style style:name="ch1400" style:family="chart" style:data-style-name="N0">