diff --git a/components/fpspreadsheet/examples/other/chart/write_chart_demo.lpr b/components/fpspreadsheet/examples/other/chart/write_chart_demo.lpr
index 089d1c2d9..bd9b0064a 100644
--- a/components/fpspreadsheet/examples/other/chart/write_chart_demo.lpr
+++ b/components/fpspreadsheet/examples/other/chart/write_chart_demo.lpr
@@ -41,10 +41,6 @@ begin
       TsLineSeries(ser).ShowSymbols := true;
       TsLineSeries(ser).Symbol := cssCircle;
     end;
-    if (ser is TsBarSeries) then
-    begin
-      TsBarSeries(ser).Kind := bskBars;
-    end;
 
     // Add second series
     ser := SERIES_CLASS.Create(ch);
@@ -67,6 +63,7 @@ begin
     ch.Background.Style := fsSolidFill;
     ch.Border.Style := clsSolid;
     ch.PlotArea.Background.Style := fsSolidFill;
+    ch.RotatedAxes := true;
 
     ch.XAxis.ShowLabels := true;
     ch.XAxis.LabelFont.Size := 8;
diff --git a/components/fpspreadsheet/source/common/fpschart.pas b/components/fpspreadsheet/source/common/fpschart.pas
index 70c9382f9..8082a4039 100644
--- a/components/fpspreadsheet/source/common/fpschart.pas
+++ b/components/fpspreadsheet/source/common/fpschart.pas
@@ -230,14 +230,9 @@ type
   end;
   TsChartSeriesClass = class of TsChartSeries;
 
-  TsBarSeriesKind = (bskColumns, bskBars);
-
   TsBarSeries = class(TsChartSeries)
-  private
-    FKind: TsBarSeriesKind;
   public
     constructor Create(AChart: TsChart); override;
-    property Kind: TsBarSeriesKind read FKind write FKind;
   end;
 
   TsChartSeriesSymbol = (
@@ -288,6 +283,8 @@ type
     FYAxis: TsChartAxis;
     FY2Axis: TsChartAxis;
 
+    FRotatedAxes: Boolean;   // For bar series: vertical columns <--> horizontal bars
+
     FTitle: TsChartText;
     FSubTitle: TsChartText;
     FLegend: TsChartLegend;
@@ -353,6 +350,8 @@ type
     property YAxis: TsChartAxis read FYAxis write FYAxis;
     { Attributes of the plot's secondary y axis (right) }
     property Y2Axis: TsChartAxis read FY2Axis write FY2Axis;
+    { x and y axes exchanged (for bar series) }
+    property RotatedAxes: Boolean read FRotatedAxes write FRotatedAxes;
 
     property CategoryLabelRange: TsCellRange read GetCategoryLabelRange;
 
diff --git a/components/fpspreadsheet/source/common/fpschartstyles.pas b/components/fpspreadsheet/source/common/fpschartstyles.pas
index fb1f34849..1d82096ad 100644
--- a/components/fpspreadsheet/source/common/fpschartstyles.pas
+++ b/components/fpspreadsheet/source/common/fpschartstyles.pas
@@ -115,7 +115,6 @@ type
     Line: TsChartLineRec;
     Fill: TsChartFillRec;
     Border: TsChartFillRec;
-    BarSeriesKind: TsBarSeriesKind;
     procedure FromChart(AChart: TsChart; AElement: TsChartStyleElement; AIndex: Integer);
     procedure ToChart(AChart: TsChart; AElement: TsChartStyleElement; AIndex: Integer);
     class operator = (A, B: TsChartSeriesRec): Boolean;
@@ -649,10 +648,6 @@ begin
   Line.FromChart(AChart, AElement, AIndex);
   Fill.FromChart(AChart, AElement, AIndex);
   Border.FromChart(AChart, AElement, AIndex);
-  if (AChart.Series[AIndex] is TsBarSeries) then
-    BarSeriesKind := TsBarSeries(AChart.Series[AIndex]).Kind
-  else
-    BarSeriesKind := bskColumns;  // Dummy value for non-bar series.
 end;
 
 procedure TsChartSeriesRec.ToChart(AChart: TsChart; AElement: TsChartStyleElement;
@@ -661,14 +656,11 @@ begin
   Line.ToChart(AChart, ceSeriesLine, AIndex);
   Fill.ToChart(AChart, ceSeriesFill, AIndex);
   Border.ToChart(AChart, ceSeriesBorder, AIndex);
-  if (AChart.Series[AIndex] is TsBarSeries) then
-    TsBarSeries(AChart.Series[AIndex]).Kind := BarSeriesKind;
 end;
 
 class operator TsChartSeriesRec.= (A, B: TsChartSeriesRec): Boolean;
 begin
-  Result := (A.Line = B.Line) and (A.Fill = B.Fill) and (A.Border = B.Border) and
-    (A.BarSeriesKind = B.BarSeriesKind);
+  Result := (A.Line = B.Line) and (A.Fill = B.Fill) and (A.Border = B.Border);
 end;
 
 
diff --git a/components/fpspreadsheet/source/common/fpsopendocument.pas b/components/fpspreadsheet/source/common/fpsopendocument.pas
index 7bbc3798d..8d6239ca1 100644
--- a/components/fpspreadsheet/source/common/fpsopendocument.pas
+++ b/components/fpspreadsheet/source/common/fpsopendocument.pas
@@ -7185,7 +7185,9 @@ end;
 function TsSpreadOpenDocWriter.GetChartAxisStyleAsXML(
   Axis: TsChartAxis; AIndent, AStyleID: Integer): String;
 var
+  chart: TsChart;
   indent: String;
+  angle: Integer;
   textProps: String = '';
   graphProps: String = '';
   chartProps: String = '';
@@ -7194,6 +7196,8 @@ begin
   if not Axis.Visible then
     exit;
 
+  chart := Axis.Chart;
+
   if Axis.ShowLabels then
     chartProps := chartProps + 'chart:display-label="true" ';
 
@@ -7203,8 +7207,14 @@ begin
   if Axis.Inverted then
     chartProps := chartProps + 'chart:reverse-direction="true" ';
 
-  if Axis.LabelRotation <> 0 then
-    chartProps := chartProps + Format('style:rotation-angle="%d" ', [Axis.LabelRotation]);
+  angle := Axis.LabelRotation;
+  {
+  if chart.RotatedAxes then
+  begin
+    if angle = 0 then angle := 90 else if angle = 90 then angle := 0;
+  end;
+  }
+  chartProps := chartProps + Format('style:rotation-angle="%d" ', [angle]);
 
   graphProps := 'svg:stroke-color="' + ColorToHTMLColorStr(Axis.AxisLine.Color) + '" ';
 
@@ -7259,7 +7269,6 @@ var
   font: TsFont;
   indent: String;
   rotAngle: Integer;
-  visible: Boolean;
   chartProps: String = '';
   textProps: String = '';
 begin
@@ -7271,7 +7280,6 @@ begin
         if ACaptionKind = 1 then title := AChart.Title else title := AChart.Subtitle;
         font := title.Font;
         rotAngle := title.RotationAngle;
-        visible := title.Visible;
       end;
     3, 4, 5, 6:
       begin
@@ -7283,15 +7291,17 @@ begin
         end;
         font := axis.CaptionFont;
         rotAngle := axis.CaptionRotation;
-        visible := axis.Visible;
+        if AChart.RotatedAxes then
+        begin
+          if rotAngle = 0 then rotAngle := 90 else if rotAngle = 90 then rotAngle := 0;
+        end;
       end;
     else
       raise Exception.Create('[GetChartCaptionStyleAsXML] Unknown caption.');
   end;
 
   chartProps := 'chart:auto-position="true" ';
-  if rotAngle <> 0 then
-    chartProps := chartProps + Format('style:rotation-angle="%d" ', [rotAngle]);
+  chartProps := chartProps + Format('style:rotation-angle="%d" ', [rotAngle]);
 
   textProps := WriteFontStyleXMLAsString(font);
 
@@ -7422,9 +7432,7 @@ var
 begin
   indent := DupeString(' ', AIndent);
 
-  if (AChart.Series.Count > 0) and (AChart.Series[0] is TsBarSeries) and
-    (TsBarSeries(AChart.Series[0]).Kind = bskBars)
-  then
+  if (AChart.Series.Count > 0) and (AChart.Series[0] is TsBarSeries) and AChart.RotatedAxes then
     verticalStr := 'chart:vertical="true" ';
 
   Result := Format(