diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..8e61928
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,28 @@
+cmake_minimum_required(VERSION 3.14)
+project(src)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake_modules" ${CMAKE_MODULE_PATH})
+
+add_subdirectory(src)
+add_subdirectory(tests)
+
+# Detect and add SFML
+find_package(SFML COMPONENTS system window graphics network audio REQUIRED)
+if(NOT SFML_FOUND)
+    message(FATAL_ERROR "SFML could not be found")
+endif()
+
+# Detect and add GTest
+find_package(GTest REQUIRED)
+if(GTest_FOUND)
+    enable_testing()
+else()
+    message(FATAL_ERROR "GTest could not be found")
+endif()
+
+# Find PugiXML
+find_path(PugiXML_INCLUDE_DIR pugixml.hpp)
+if(NOT IS_DIRECTORY ${PugiXML_INCLUDE_DIR})
+    message(FATAL_ERROR "PugiXML could not be found")
+endif()
\ No newline at end of file
diff --git a/README.md b/README.md
index 4a5b38f..7d4ca64 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,10 @@ Project Maat is the codename of my C++ course "mini-project" based on the quote
 
 This game is aimed to be a puzzle game in which the player sets different laws for the world and the people within it as to control what happens after hitting "play" and achieve the level's goal. I was inspired both by [The Incredible Machine](https://en.wikipedia.org/wiki/The_Incredible_Machine_(video_game)) and its successors and by a much more recent game : [Baba is you](https://en.wikipedia.org/wiki/Baba_Is_You).
 
+## Structure
+
+![UML Diagram](UML_Class_Diagram.png)
+
 ## TODO
 
  - [ ] Level
diff --git a/UML_Class_Diagram.png b/UML_Class_Diagram.png
new file mode 100644
index 0000000..c9f4d91
Binary files /dev/null and b/UML_Class_Diagram.png differ
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
new file mode 100644
index 0000000..df9624a
--- /dev/null
+++ b/src/CMakeLists.txt
@@ -0,0 +1,12 @@
+cmake_minimum_required(VERSION 3.14)
+project(src)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake_modules" ${CMAKE_MODULE_PATH})
+
+add_library(engine Level.cpp Level.h Entity.cpp Entity.h)
+
+target_link_libraries(engine
+        sfml-window
+        sfml-graphics
+        sfml-system)
\ No newline at end of file
diff --git a/src/Entity.cpp b/src/Entity.cpp
new file mode 100644
index 0000000..2f48d00
--- /dev/null
+++ b/src/Entity.cpp
@@ -0,0 +1,5 @@
+//
+// Created by trotfunky on 06/06/19.
+//
+
+#include "Entity.h"
diff --git a/src/Entity.h b/src/Entity.h
new file mode 100644
index 0000000..d89911c
--- /dev/null
+++ b/src/Entity.h
@@ -0,0 +1,14 @@
+//
+// Created by trotfunky on 06/06/19.
+//
+
+#ifndef SRC_ENTITY_H
+#define SRC_ENTITY_H
+
+
+class Entity {
+
+};
+
+
+#endif //SRC_ENTITY_H
diff --git a/src/Level.cpp b/src/Level.cpp
new file mode 100644
index 0000000..a6a22d8
--- /dev/null
+++ b/src/Level.cpp
@@ -0,0 +1,5 @@
+//
+// Created by trotfunky on 06/06/19.
+//
+
+#include "Level.h"
diff --git a/src/Level.h b/src/Level.h
new file mode 100644
index 0000000..a3f959b
--- /dev/null
+++ b/src/Level.h
@@ -0,0 +1,18 @@
+//
+// Created by trotfunky on 06/06/19.
+//
+
+#ifndef SRC_LEVEL_H
+#define SRC_LEVEL_H
+
+
+class Level {
+    Level();
+
+private:
+    int width;
+    int height;
+};
+
+
+#endif //SRC_LEVEL_H
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
new file mode 100644
index 0000000..0d53663
--- /dev/null
+++ b/tests/CMakeLists.txt
@@ -0,0 +1,12 @@
+cmake_minimum_required(VERSION 3.14)
+project(src)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake_modules" ${CMAKE_MODULE_PATH})
+
+add_executable(gTests gTests.cpp gTests.cpp)
+
+target_link_libraries(gTests
+        engine
+        gtest
+        pthread)
\ No newline at end of file
diff --git a/tests/gTests.cpp b/tests/gTests.cpp
new file mode 100644
index 0000000..0eccc74
--- /dev/null
+++ b/tests/gTests.cpp
@@ -0,0 +1,11 @@
+//
+// Created by Teo-CD on 06/06/19.
+//
+
+#include <gtest/gtest.h>
+
+int main(int argc, char** argv)
+{
+    ::testing::InitGoogleTest(&argc,argv);
+    return RUN_ALL_TESTS();
+}
\ No newline at end of file