diff --git a/Old_Packages/Doc23/changes.txt b/Old_Packages/Doc23/changes.txt
index f48b2fda58e..3e30fc43e76 100644
--- a/Old_Packages/Doc23/changes.txt
+++ b/Old_Packages/Doc23/changes.txt
@@ -1,3 +1,6 @@
+2.15    (13 Apr 2001)
+- coplanar_side_of_oriented_circle().
+
 2.14    (23 Mar 2001)
 - Add Construct_center_[23].
 
diff --git a/Old_Packages/Doc23/doc_tex/kernel/Ref/Kernel.tex b/Old_Packages/Doc23/doc_tex/kernel/Ref/Kernel.tex
index f393a8abcb1..b761135fccb 100644
--- a/Old_Packages/Doc23/doc_tex/kernel/Ref/Kernel.tex
+++ b/Old_Packages/Doc23/doc_tex/kernel/Ref/Kernel.tex
@@ -377,6 +377,8 @@ If the result type is a number type, the prefix is \ccc{Compute_}:
 \ccGlue
 \ccNestedType{Coplanar_orientation_3}{}
 \ccGlue
+\ccNestedType{Coplanar_side_of_oriented_circle_3}{}
+\ccGlue
 \ccNestedType{Side_of_oriented_sphere_3}{}
 \ccGlue
 \ccNestedType{Side_of_bounded_sphere_3}{}
@@ -711,6 +713,8 @@ an \ccc{_object} suffix.
 \ccGlue
 \ccMemberFunction{Kernel::Coplanar_orientation_3 coplanar_orientation_3_object() const ;}{}
 \ccGlue
+\ccMemberFunction{Kernel::Coplanar_side_of_oriented_circle_3 coplanar_side_of_oriented_circle_3_object() const ;}{}
+\ccGlue
 \ccMemberFunction{Kernel::Orientation_3 orientation_3_object() const ;}{}
 \ccGlue
 \ccMemberFunction{Kernel::Is_degenerate_3 is_degenerate_3_object() const ;}{}
diff --git a/Old_Packages/Doc23/doc_tex/kernel/Ref/Kernel_Coplanar_side_of_oriented_circle_3.tex b/Old_Packages/Doc23/doc_tex/kernel/Ref/Kernel_Coplanar_side_of_oriented_circle_3.tex
new file mode 100644
index 00000000000..9099012a127
--- /dev/null
+++ b/Old_Packages/Doc23/doc_tex/kernel/Ref/Kernel_Coplanar_side_of_oriented_circle_3.tex
@@ -0,0 +1,16 @@
+\begin{ccRefFunctionObjectConcept}{Kernel::Coplanar_side_of_oriented_circle_3}
+A model for this must provide:
+
+\ccCreationVariable{fo}
+
+\ccMemberFunction{Oriented_side operator()(const Kernel::Point_3&p,
+                                           const Kernel::Point_3&q,
+                                           const Kernel::Point_3&r,
+                                           const Kernel::Point_3&s);}
+         {returns the oriented side of the circle defined
+          by \ccc{p}, \ccc{q}, and \ccc{r} on which \ccc{s} lies.
+          \ccPrecond \ccc{p}, \ccc{q}, \ccc{r}, and \ccc{s} are coplanar and
+          \ccc{p}, \ccc{q}, and \ccc{r} are not collinear.}
+
+\end{ccRefFunctionObjectConcept}
+
diff --git a/Old_Packages/Doc23/doc_tex/kernel/main.tex b/Old_Packages/Doc23/doc_tex/kernel/main.tex
index 0165f5200d4..8ef1639d734 100644
--- a/Old_Packages/Doc23/doc_tex/kernel/main.tex
+++ b/Old_Packages/Doc23/doc_tex/kernel/main.tex
@@ -335,6 +335,8 @@
 \KernelRefLayout
 \input{Ref/Kernel_Coplanar_orientation_3.tex} %ck
 \KernelRefLayout
+\input{Ref/Kernel_Coplanar_side_of_oriented_circle_3.tex} %ck
+\KernelRefLayout
 \input{Ref/Kernel_Counterclockwise_in_between_2.tex} %ck
 \KernelRefLayout
 \input{Ref/Kernel_Direction_2.tex} %ck
diff --git a/Packages/Kernel_23/doc_tex/kernel/Ref/Kernel.tex b/Packages/Kernel_23/doc_tex/kernel/Ref/Kernel.tex
index f393a8abcb1..b761135fccb 100644
--- a/Packages/Kernel_23/doc_tex/kernel/Ref/Kernel.tex
+++ b/Packages/Kernel_23/doc_tex/kernel/Ref/Kernel.tex
@@ -377,6 +377,8 @@ If the result type is a number type, the prefix is \ccc{Compute_}:
 \ccGlue
 \ccNestedType{Coplanar_orientation_3}{}
 \ccGlue
+\ccNestedType{Coplanar_side_of_oriented_circle_3}{}
+\ccGlue
 \ccNestedType{Side_of_oriented_sphere_3}{}
 \ccGlue
 \ccNestedType{Side_of_bounded_sphere_3}{}
@@ -711,6 +713,8 @@ an \ccc{_object} suffix.
 \ccGlue
 \ccMemberFunction{Kernel::Coplanar_orientation_3 coplanar_orientation_3_object() const ;}{}
 \ccGlue
+\ccMemberFunction{Kernel::Coplanar_side_of_oriented_circle_3 coplanar_side_of_oriented_circle_3_object() const ;}{}
+\ccGlue
 \ccMemberFunction{Kernel::Orientation_3 orientation_3_object() const ;}{}
 \ccGlue
 \ccMemberFunction{Kernel::Is_degenerate_3 is_degenerate_3_object() const ;}{}
diff --git a/Packages/Kernel_23/doc_tex/kernel/main.tex b/Packages/Kernel_23/doc_tex/kernel/main.tex
index 0165f5200d4..8ef1639d734 100644
--- a/Packages/Kernel_23/doc_tex/kernel/main.tex
+++ b/Packages/Kernel_23/doc_tex/kernel/main.tex
@@ -335,6 +335,8 @@
 \KernelRefLayout
 \input{Ref/Kernel_Coplanar_orientation_3.tex} %ck
 \KernelRefLayout
+\input{Ref/Kernel_Coplanar_side_of_oriented_circle_3.tex} %ck
+\KernelRefLayout
 \input{Ref/Kernel_Counterclockwise_in_between_2.tex} %ck
 \KernelRefLayout
 \input{Ref/Kernel_Direction_2.tex} %ck