diff --git a/src/Box.cpp b/src/Box.cpp
index ed791f1..204a3b2 100644
--- a/src/Box.cpp
+++ b/src/Box.cpp
@@ -3,15 +3,15 @@
 
 namespace Raven {
 
-bool Box::contains_point(double x, double y) {
+bool Box::contains_point(double x, double y) const {
     return x >= m_x && m_x + m_width >= x && y >= m_y && m_y + m_height >= y;
 }
 
-bool Box::contains_point(Point &point) {
+bool Box::contains_point(const Point &point) const {
     return point.get_x() >= m_x && m_x + m_width >= point.get_x() && point.get_y() >= m_y && m_y + m_height >= point.get_y();
 }
 
-bool Box::contains_box(Box &other) const {
+bool Box::contains_box(const Box &other) const {
     double ax1 = m_x;
     double ax2 = m_x + m_width;
     double ay1 = m_y;
diff --git a/src/Box.hpp b/src/Box.hpp
index f36e953..5f734fa 100644
--- a/src/Box.hpp
+++ b/src/Box.hpp
@@ -26,14 +26,19 @@ public:
     double get_width() { return m_width; }
     double get_height() { return m_height; }
 
+    double get_x() const { return m_x; }
+    double get_y() const { return m_y; }
+    double get_width() const { return m_width; }
+    double get_height() const { return m_height; }
+
     void set_x(double x) { m_x = x; }
     void set_y(double y) { m_y = y; }
     void set_width(double width) { m_width = width; }
     void set_height(double height) { m_height = height; }
 
-    bool contains_point(double x, double y);
-    bool contains_point(Point &point);
-    bool contains_box(Box &other) const;
+    bool contains_point(double x, double y) const;
+    bool contains_point(const Point &point) const;
+    bool contains_box(const Box &other) const;
 };
 
 }