diff --git a/src/Gui/Quarter/QuarterWidget.cpp b/src/Gui/Quarter/QuarterWidget.cpp
index 3560d595de..b69b87ca5d 100644
--- a/src/Gui/Quarter/QuarterWidget.cpp
+++ b/src/Gui/Quarter/QuarterWidget.cpp
@@ -76,9 +76,7 @@
 #include <QWindow>
 
 #include <Inventor/C/basic.h>
-#if COIN_MAJOR_VERSION >= 4
 #include <Inventor/SbByteBuffer.h>
-#endif
 
 #include <Inventor/SbColor.h>
 #include <Inventor/SbViewportRegion.h>
@@ -1245,11 +1243,7 @@ QuarterWidget::setNavigationModeFile(const QUrl & url)
     QFile file(filenametmp);
     if (file.open(QIODevice::ReadOnly)){
       QByteArray fileContents = file.readAll();
-#if COIN_MAJOR_VERSION >= 4
       stateMachine = ScXML::readBuffer(SbByteBuffer(fileContents.size(), fileContents.constData()));
-#else
-      stateMachine = ScXML::readBuffer(fileContents.constData());
-#endif
       file.close();
     }
   }
diff --git a/src/Gui/SoTextLabel.cpp b/src/Gui/SoTextLabel.cpp
index 6e533bea98..695ba378e3 100644
--- a/src/Gui/SoTextLabel.cpp
+++ b/src/Gui/SoTextLabel.cpp
@@ -51,12 +51,7 @@
 #include <Inventor/elements/SoViewingMatrixElement.h>
 #include <Inventor/elements/SoViewportRegionElement.h>
 #include <Inventor/elements/SoViewVolumeElement.h>
-
-#if COIN_MAJOR_VERSION > 3
 #include <Inventor/elements/SoMultiTextureEnabledElement.h>
-#else
-#include <Inventor/elements/SoGLTexture3EnabledElement.h>
-#endif
 
 #include "SoTextLabel.h"
 #include "SoFCInteractiveElement.h"
@@ -65,31 +60,6 @@
 
 using namespace Gui;
 
-/*!
-\code
-
-s="""
-  #Inventor V2.1 ascii
-
-  Annotation {
-    Translation { translation 4 0 0 }
-    FontStyle {
-        size 20
-        style BOLD
-    }
-    BaseColor {
-        rgb 0.0 0.0 0.0
-    }
-
-
-    SoTextLabel { string ["Text label", "Second line"] backgroundColor 1.0 0.447059 0.337255}
-  }
-"""
-
-App.ActiveDocument.addObject("App::InventorObject","iv").Buffer=s
-
-\endcode
-*/
 
 SO_NODE_SOURCE(SoTextLabel)
 
@@ -215,11 +185,7 @@ void SoTextLabel::GLRender(SoGLRenderAction *action)
 
         // disable textures for all units
         SoGLTextureEnabledElement::set(state, this, false);
-#if COIN_MAJOR_VERSION > 3
         SoMultiTextureEnabledElement::set(state, this, false);
-#else
-        SoGLTexture3EnabledElement::set(state, this, false);
-#endif
 
         glPushAttrib(GL_ENABLE_BIT | GL_PIXEL_MODE_BIT | GL_COLOR_BUFFER_BIT);
         glPushClientAttrib(GL_CLIENT_PIXEL_STORE_BIT);
diff --git a/src/Gui/View3DInventorViewer.cpp b/src/Gui/View3DInventorViewer.cpp
index 3103b1afde..f8c3e5df70 100644
--- a/src/Gui/View3DInventorViewer.cpp
+++ b/src/Gui/View3DInventorViewer.cpp
@@ -1707,16 +1707,11 @@ void View3DInventorViewer::savePicture(int width, int height, int sample, const
     auto root = new SoSeparator;
     root->ref();
 
-#if (COIN_MAJOR_VERSION >= 4)
-    // The behaviour in Coin4 has changed so that when using the same instance of 'SoFCOffscreenRenderer'
-    // multiple times internally the biggest viewport size is stored and set to the SoGLRenderAction.
-    // The trick is to add a callback node and override the viewport size with what we want.
     if (useCoinOffscreenRenderer) {
         auto cbvp = new SoCallback;
         cbvp->setCallback(setViewportCB);
         root->addChild(cbvp);
     }
-#endif
 
     SoCamera* camera = getSoRenderManager()->getCamera();
 
@@ -3524,7 +3519,6 @@ void View3DInventorViewer::viewSelection()
                     float(bbox.MaxX),
                     float(bbox.MaxY),
                     float(bbox.MaxZ));
-#if (COIN_MAJOR_VERSION >= 4)
         float aspectratio = getSoRenderManager()->getViewportRegion().getViewportAspectRatio();
         switch (cam->viewportMapping.getValue()) {
             case SoCamera::CROP_VIEWPORT_FILL_FRAME:
@@ -3536,27 +3530,6 @@ void View3DInventorViewer::viewSelection()
                 break;
         }
         cam->viewBoundingBox(box,aspectratio,1.0);
-#else
-        SoTempPath path(2);
-        path.ref();
-        auto pcGroup = new SoGroup;
-        pcGroup->ref();
-        auto pcTransform = new SoTransform;
-        pcGroup->addChild(pcTransform);
-        pcTransform->translation = box.getCenter();
-        auto *pcCube = new SoCube;
-        pcGroup->addChild(pcCube);
-        float sizeX,sizeY,sizeZ;
-        box.getSize(sizeX,sizeY,sizeZ);
-        pcCube->width = sizeX;
-        pcCube->height = sizeY;
-        pcCube->depth = sizeZ;
-        path.append(pcGroup);
-        path.append(pcCube);
-        cam->viewAll(&path,getSoRenderManager()->getViewportRegion());
-        path.unrefNoDelete();
-        pcGroup->unref();
-#endif
     }
 }
 
diff --git a/src/Gui/ViewProviderAnnotation.cpp b/src/Gui/ViewProviderAnnotation.cpp
index c1cb67e3ce..785a96f368 100644
--- a/src/Gui/ViewProviderAnnotation.cpp
+++ b/src/Gui/ViewProviderAnnotation.cpp
@@ -248,15 +248,8 @@ void ViewProviderAnnotation::updateData(const App::Property* prop)
             const char* cs = line.c_str();
             if (line.empty())
                 cs = " "; // empty lines make coin crash, we use a space instead
-#if (COIN_MAJOR_VERSION <= 3)
-            QByteArray latin1str;
-            latin1str = (QString::fromUtf8(cs)).toLatin1();
-            pLabel->string.set1Value(index, SbString(latin1str.constData()));
-            pLabel3d->string.set1Value(index, SbString(latin1str.constData()));
-#else
             pLabel->string.set1Value(index, SbString(cs));
             pLabel3d->string.set1Value(index, SbString(cs));
-#endif
             index++;
         }
     }
diff --git a/src/Mod/Sandbox/Gui/GLGraphicsView.cpp b/src/Mod/Sandbox/Gui/GLGraphicsView.cpp
index 544762e22b..316dc31aa0 100644
--- a/src/Mod/Sandbox/Gui/GLGraphicsView.cpp
+++ b/src/Mod/Sandbox/Gui/GLGraphicsView.cpp
@@ -454,11 +454,7 @@ GraphicsScene::setNavigationModeFile(const QUrl & url)
         QFile file(QString::fromLatin1(filenametmp));
         if (file.open(QIODevice::ReadOnly)) {
             QByteArray fileContents = file.readAll();
-#if COIN_MAJOR_VERSION >= 4
             stateMachine = ScXML::readBuffer(SbByteBuffer(fileContents.size(), fileContents.constData()));
-#else
-            stateMachine = ScXML::readBuffer(fileContents.constData());
-#endif
             file.close();
         }
     }