The course consists of three parts: In the introductory part, the student will be acquainted with the history of the discussion on the unification of Contract Law in Europe as well as with the debate on its importance. The first main part (general part) deals with fundamental issues on the conclusion and performance of contracts (such as pre-contractual liability, mistake, misrepresentation and fraud, unfair clauses, remedies in case of breach of contract and unforeseen change of circumstances). The analysis relies both on comparative law and on EU legislation on relevant issues. This provides a solid basis in order to proceed critically to the approach adopted in the Principles of European Contract Law (PECL) and in the Draft Common Frame of Reference (DCFR). Brief reference is also made to the Unidroit Principles of International Commercial Contracts 2010. The second main part (general part) is dedicated to the UN Convention on Contracts for the International Sale of Goods (CISG)discusses special Sales Law issues. The analysis is enriched with reference to the Proposal for a Regulation on a Common European Sales Law.