diff --git a/.gitattributes b/.gitattributes
index 3160accb6a4..f751adf1c94 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -3917,10 +3917,10 @@ Triangulation/include/CGAL/Pure_complex_simplex.h -text
 Triangulation/include/CGAL/Pure_complex_vertex.h -text
 Triangulation/include/CGAL/Regular_complex.h -text
 Triangulation/include/CGAL/internal/Combination_enumerator.h -text
-Triangulation/include/CGAL/internal/Pure_complex/Dummy_TDS.h -text
-Triangulation/include/CGAL/internal/Pure_complex/Triangulation_ds_iterators.h -text
-Triangulation/include/CGAL/internal/Pure_complex/utilities.h -text
 Triangulation/include/CGAL/internal/Static_or_dynamic_array.h -text
+Triangulation/include/CGAL/internal/Triangulation/Dummy_TDS.h -text
+Triangulation/include/CGAL/internal/Triangulation/Triangulation_ds_iterators.h -text
+Triangulation/include/CGAL/internal/Triangulation/utilities.h -text
 Triangulation/package_info/Pure_complex/description.txt -text
 Triangulation/package_info/Pure_complex/maintainer -text
 Triangulation/test/Triangulation/delaunay.cpp -text
diff --git a/Triangulation/include/CGAL/Pure_complex.h b/Triangulation/include/CGAL/Pure_complex.h
index 5a87356c060..3cb3add95c3 100644
--- a/Triangulation/include/CGAL/Pure_complex.h
+++ b/Triangulation/include/CGAL/Pure_complex.h
@@ -19,7 +19,7 @@
 #define CGAL_TRIANGULATION_H
 
 #include <boost/iterator/filter_iterator.hpp>
-#include <CGAL/internal/Pure_complex/utilities.h>
+#include <CGAL/internal/Triangulation/utilities.h>
 #include <CGAL/Pure_complex_data_structure.h>
 #include <CGAL/Pure_complex_simplex.h>
 #include <CGAL/Pure_complex_vertex.h>
diff --git a/Triangulation/include/CGAL/Pure_complex_data_structure.h b/Triangulation/include/CGAL/Pure_complex_data_structure.h
index 5aa23bc0eb1..76af8f50d67 100644
--- a/Triangulation/include/CGAL/Pure_complex_data_structure.h
+++ b/Triangulation/include/CGAL/Pure_complex_data_structure.h
@@ -27,8 +27,8 @@
 #include <CGAL/Pure_complex_ds_vertex.h>
 #include <CGAL/Pure_complex_ds_simplex.h>
 #include <CGAL/internal/Combination_enumerator.h>
-#include <CGAL/internal/Pure_complex/utilities.h>
-#include <CGAL/internal/Pure_complex/Triangulation_ds_iterators.h>
+#include <CGAL/internal/Triangulation/utilities.h>
+#include <CGAL/internal/Triangulation/Triangulation_ds_iterators.h>
 
 #include <algorithm>
 #include <vector>
diff --git a/Triangulation/include/CGAL/Pure_complex_ds_simplex.h b/Triangulation/include/CGAL/Pure_complex_ds_simplex.h
index 1a332680750..a53f202b5dd 100644
--- a/Triangulation/include/CGAL/Pure_complex_ds_simplex.h
+++ b/Triangulation/include/CGAL/Pure_complex_ds_simplex.h
@@ -20,7 +20,7 @@
 
 #include <CGAL/PCDS_simplex_default_storage_policy.h>
 #include <CGAL/PCDS_simplex_mirror_storage_policy.h>
-#include <CGAL/internal/Pure_complex/Dummy_TDS.h>
+#include <CGAL/internal/Triangulation/Dummy_TDS.h>
 #include <CGAL/Dimension.h>
 #include <CGAL/Default.h>
 #include <CGAL/array.h>
diff --git a/Triangulation/include/CGAL/Pure_complex_ds_vertex.h b/Triangulation/include/CGAL/Pure_complex_ds_vertex.h
index c3cd9abcece..31122f765c7 100644
--- a/Triangulation/include/CGAL/Pure_complex_ds_vertex.h
+++ b/Triangulation/include/CGAL/Pure_complex_ds_vertex.h
@@ -21,7 +21,7 @@
 //#include <CGAL/basic.h>
 //#include <CGAL/Iterator_project.h>
 #include <CGAL/Compact_container.h>
-#include <CGAL/internal/Pure_complex/Dummy_TDS.h>
+#include <CGAL/internal/Triangulation/Dummy_TDS.h>
 
 namespace CGAL {
 
diff --git a/Triangulation/include/CGAL/internal/Pure_complex/Dummy_TDS.h b/Triangulation/include/CGAL/internal/Triangulation/Dummy_TDS.h
similarity index 100%
rename from Triangulation/include/CGAL/internal/Pure_complex/Dummy_TDS.h
rename to Triangulation/include/CGAL/internal/Triangulation/Dummy_TDS.h
diff --git a/Triangulation/include/CGAL/internal/Pure_complex/Triangulation_ds_iterators.h b/Triangulation/include/CGAL/internal/Triangulation/Triangulation_ds_iterators.h
similarity index 100%
rename from Triangulation/include/CGAL/internal/Pure_complex/Triangulation_ds_iterators.h
rename to Triangulation/include/CGAL/internal/Triangulation/Triangulation_ds_iterators.h
diff --git a/Triangulation/include/CGAL/internal/Pure_complex/utilities.h b/Triangulation/include/CGAL/internal/Triangulation/utilities.h
similarity index 100%
rename from Triangulation/include/CGAL/internal/Pure_complex/utilities.h
rename to Triangulation/include/CGAL/internal/Triangulation/utilities.h