diff --git a/Chapter four - monero.md b/Chapter four - monero.md
new file mode 100644
index 00000000..c6876114
--- /dev/null
+++ b/Chapter four - monero.md	
@@ -0,0 +1,4 @@
+# The Monero circuit
+
+![The Monero circuit](monero.png)
+
diff --git a/monero.png b/monero.png
new file mode 100644
index 00000000..bfe7ddd2
Binary files /dev/null and b/monero.png differ