diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5df1ca7..957f3ad 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,7 +17,7 @@ FetchContent_Declare(
 )
 FetchContent_MakeAvailable(eigen)
 
-include_directories(${PROJECT_SOURCE_DIR}/include ${PROJECT_SOURCE_DIR}/Geometry)
+#include_directories(${PROJECT_SOURCE_DIR}/include ${PROJECT_SOURCE_DIR}/Geometry)
 
 add_subdirectory(src)
 
diff --git a/apps/CMakeLists.txt b/apps/CMakeLists.txt
index c5c5918..85887dd 100644
--- a/apps/CMakeLists.txt
+++ b/apps/CMakeLists.txt
@@ -1,3 +1,3 @@
 add_executable(app main.cpp)
 
-target_link_libraries(app PUBLIC Eigen3::Eigen)
+target_link_libraries(app PUBLIC Eigen3::Eigen Geometry)
diff --git a/apps/main.cpp b/apps/main.cpp
index ae97491..e5c5973 100644
--- a/apps/main.cpp
+++ b/apps/main.cpp
@@ -1,15 +1,8 @@
+#include "Geometry/dummy.h"
 #include "main.h"
-
 int main(){
     cout<<"Hello World"<<endl;
     eigenExample();
     return 0;
 }
 
-void eigenExample(){
-    Eigen::MatrixXd m(2,2);
-    m(1,0) = 2.5;
-    m(0,1) = -1;
-    m(1,1) = m(1,0) + m(0,1);
-    cout << m << endl;
-}
\ No newline at end of file
diff --git a/include/Geometry/dummy.h b/include/Geometry/dummy.h
index 81c7f53..2abb9d3 100644
--- a/include/Geometry/dummy.h
+++ b/include/Geometry/dummy.h
@@ -5,4 +5,6 @@
 #ifndef GEOMETRY_DUMMY_H
 #define GEOMETRY_DUMMY_H
 
+void eigenExample();
+
 #endif //GEOMETRY_DUMMY_H
diff --git a/include/main.h b/include/main.h
index c9d4a50..f62e65e 100644
--- a/include/main.h
+++ b/include/main.h
@@ -10,8 +10,6 @@
 
 using namespace std;
 
-void eigenExample();
-
 int main();
 
 #endif //GEOMETRY_MAIN_H
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 092fc63..c983e96 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -3,7 +3,9 @@ set(HEADER_LIST "${Geometry_SOURCE_DIR}/include/Geometry/dummy.h")
 add_library(Geometry Dummy.cpp ${HEADER_LIST}
         testclass.cpp)
 
-target_include_directories(Geometry PUBLIC "${PROJECT_SOURCE_DIR}/include" "${PROJECT_SOURCE_DIR}/Geometry")
+target_include_directories(Geometry PUBLIC "${PROJECT_SOURCE_DIR}/include")
+
+target_link_libraries(Geometry PUBLIC Eigen3::Eigen)
 
 source_group(
         TREE "${PROJECT_SOURCE_DIR}/include"
diff --git a/src/Dummy.cpp b/src/Dummy.cpp
index 400c59a..ff09b57 100644
--- a/src/Dummy.cpp
+++ b/src/Dummy.cpp
@@ -1,4 +1,16 @@
 //
 // Created by nb on 31.12.23.
 //
-#include "dummy.h"
\ No newline at end of file
+#include "Geometry/dummy.h"
+#include <Eigen/Dense>
+#include <iostream>
+
+using namespace std;
+
+void eigenExample(){
+    Eigen::MatrixXd m(2,2);
+    m(1,0) = 2.5;
+    m(0,1) = -1;
+    m(1,1) = m(1,0) + m(0,1);
+    cout << m << endl;
+}
\ No newline at end of file