<DataTemplate x:Key="{x:Static r:ResourcesKeys.TabContentSpectral}" DataType="WpfPlot">
				<t:ProportionalStackPanel Orientation="Vertical">
					<t:RadToolBar t:ProportionalStackPanel.ElementHeight="32">
						<t:RadButton Command="{Binding ResetCommand}"									 
							ToolTip="{DynamicResource ResourceKey={x:Static r:ResourcesKeys.ResetMapTooltip}}">
							<Image Source="/DeltaOhm.NsModules;component/Images/refresh.png"
																		   Style="{StaticResource ResourceKey=TreeviewImageSize}"/>
						</t:RadButton>
						<t:RadButton x:Name="ToolbarSetAxisScale"
							ToolTip="{DynamicResource ResourceKey={x:Static r:ResourcesKeys.MISetAxisScale}}"
							Loaded="ToolbarSetAxisScale_Loaded">
							<Image Source="/DeltaOhm.NsModules;component/Images/ToolbarSetAxisScale.png"
																		   Style="{StaticResource ResourceKey=TreeviewImageSize}"/>
						</t:RadButton>
						<t:RadButton
							ToolTip="{DynamicResource ResourceKey={x:Static r:ResourcesKeys.ColorPaletteTooltip}}"
							Loaded="RadPathButton_Loaded">
							<Image Source="/DeltaOhm.NsModules;component/Images/ToolbarColorPalette.png"
																		   Style="{StaticResource ResourceKey=TreeviewImageSize}"/>
						</t:RadButton>
						<t:RadButton
							x:Name="SonogrammaMinimi"
							ToolTip="{DynamicResource ResourceKey={x:Static r:ResourcesKeys.SonogrammaDeiMinimiTooltip}}"
							Command="{Binding CalcolaSpettroDeiMinimiCommand}">
							<Image Source="/DeltaOhm.NsModules;component/Images/SonogrammaDeiMinimi.png"
																		   Style="{StaticResource ResourceKey=TreeviewImageSize}"/>
						</t:RadButton>
					</t:RadToolBar>
					<t:RadDocking x:Name="DockingSpectral"
						RetainPaneSizeMode="DockingAndFloating">
						<t:RadDocking.DocumentHost>
							<t:RadPaneGroup x:Name="RadPaneGroup1">
								<t:RadPane x:Name="PaneSpectralColorMap" t:RadDocking.SerializationTag="PaneSpectralColorMap" 
										   Loaded="PaneSpectralColorMap_Loaded">
									<Grid x:Name="Grid1">
										<local:SpectralColorMapControl Loaded="SpectralColorMapControl_Loaded" TabIndex="0"
													   SizeChanged="SpectralColorMapControl_SizeChanged"/>
									</Grid>
								</t:RadPane>
							</t:RadPaneGroup>
						</t:RadDocking.DocumentHost>
						<t:RadSplitContainer
							x:Name="SpectralTimeHistory" InitialPosition="DockedBottom"
											 MinHeight="180">
							<t:RadPaneGroup >
								<t:RadPane x:Name="PaneSpectralTimeHistory" t:RadDocking.SerializationTag="PaneSpectralTimeHistory"
										   Loaded="PaneSpectralTimeHistory_Loaded">
									<Grid>
										<local:SpectralTimeHistoryControl TabIndex="1"
											Loaded="SpectralTimeHistoryControl_Loaded"	
											Frequency="{Binding FrequencySelected, Mode=TwoWay}"/>
									</Grid>
								</t:RadPane>
							</t:RadPaneGroup>
						</t:RadSplitContainer>
						<t:RadSplitContainer x:Name="SpectralHistogram" InitialPosition="DockedRight"
											 MinWidth="225">
							<t:RadPaneGroup x:Name="RadPaneGroup2">
								<t:RadPane x:Name="PaneSpectralHistogram" t:RadDocking.SerializationTag="PaneSpectralHistogram"
										   Loaded="PaneSpectralHistogram_Loaded">
									<Grid x:Name="Grid2">
										<local:SpectralHistogramControl x:Name="SpectralHistogramControl1"
											Loaded="SpectralHistogramControl_Loaded"
											TimeStamp="{Binding MainVM.TabCursori.CursorV0DT, Mode=TwoWay}"
											Intervallo="{Binding MainVM.TabCursori.CursorRange}"/>
									</Grid>
								</t:RadPane>
							</t:RadPaneGroup>
						</t:RadSplitContainer>
					</t:RadDocking>
				</t:ProportionalStackPanel>
			</DataTemplate>

		private void PaneSpectralColorMap_Loaded(object sender, RoutedEventArgs e)
		{
			if (sender is RadPane pane)
			{
				pane.SetBinding(HeaderedContentControl.HeaderProperty, new Binding("Plot.SpectralColorMapVM.Title"));
			}
		}
		private void PaneSpectralTimeHistory_Loaded(object sender, RoutedEventArgs e)
		{
			if (sender is RadPane pane)
			{
				pane.SetBinding(HeaderedContentControl.HeaderProperty, new Binding("Plot.SpectralProfileVM.Title"));
			}
		}
		private void PaneSpectralHistogram_Loaded(object sender, RoutedEventArgs e)
		{
			if (sender is RadPane pane)
			{
				pane.SetBinding(HeaderedContentControl.HeaderProperty, new Binding("Plot.SpectralHistogramVM.Title"));
			}

		}

var data = new ObservableCollection<MyDataRow>(); //DynamicObject

Where MyDataRow is created from 2D array of various objects (MyClass, Strings, etc).

And I would like to choose template based on value (or type of object) which will be presented in the cell, but the only way, that achieved the desired result, was to add TemplateSelector which dynamicly creates a concrete datatemplate for each column/cell.
Simplified version of my Selector:

public class MyTemplateSelector : DataTemplateSelector
{
	public override System.Windows.DataTemplate SelectTemplate(object item, System.Windows.DependencyObject container)
	{
		if(container is GridViewCell gridViewCell && item != null)
		{
			int columnIndex = gridViewCell.Column.DisplayIndex;
			DataTemplate dataTemplate = null;
			MyDataRow myDataRow = item as MyDataRow;
			if (myDataRow["Column" + columnIndex] is MyClass)
			{	// Template example 1
				StringReader stringReader = new StringReader(
				@"<DataTemplate 
				xmlns=""http://schemas.microsoft.com/winfx/2006/xaml/presentation""> 
					<TextBlock Text=""{Binding Column" + columnIndex + @".ResultText}""/> 
				</DataTemplate>");
				XmlReader xmlReader = XmlReader.Create(stringReader);
				dataTemplate = XamlReader.Load(xmlReader) as DataTemplate;
			}
			else
			{   // Template example 2
				StringReader stringReader = new StringReader(
				@"<DataTemplate 
				xmlns=""http://schemas.microsoft.com/winfx/2006/xaml/presentation""> 
					<TextBlock Text=""{Binding Column" + columnIndex + @"}""/> 
				</DataTemplate>");
				XmlReader xmlReader = XmlReader.Create(stringReader);
				dataTemplate = XamlReader.Load(xmlReader) as DataTemplate;
			}
			if (!dataTemplates.ContainsKey(columnIndex))
			{
				dataTemplates.Add(columnIndex, dataTemplate);
			}
			return dataTemplates[columnIndex];
		}
		return null;
	}
	// Dictionary of already defined templates
	Dictionary<int, DataTemplate> dataTemplates = new Dictionary<int, DataTemplate>();
}