diff --git a/README.md b/README.md
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+++ b/README.md
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 # Master Thesis Introduction
 
 Introductory work for my Master's Internship at HEP, organised in Jupyter Notebooks.
+
+Topics:
+ * [Fourier Transforms](./fourier)
diff --git a/01_fourier.ipynb b/fourier/01_fourier.ipynb
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rename to fourier/01_fourier.ipynb
diff --git a/02_fourier_phase.ipynb b/fourier/02_fourier_phase.ipynb
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rename from 02_fourier_phase.ipynb
rename to fourier/02_fourier_phase.ipynb
diff --git a/fourier/README.md b/fourier/README.md
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+# Fourier
+
+Some introductions into fourier.