Classification of Irregular Varieties : Minimal Models and Abelian Varieties. Proceedings of a Conference held in Trento Italy 17–21 December 1990 M. Andreatta E.Ballico J.Wisniewski: Projective manifolds containing large linear subspaces; F.Bardelli: Algebraic cohomology classes on some specialthreefolds; Ch.Birkenhake H.Lange: Norm endomorphisms of abelian subvarieties; C.Ciliberto G.van der Geer: On the jacobian of ahyperplane section of a surface; C.Ciliberto H.Harris M.Teixidor i Bigas: On the endomorphisms of Jac (W1d(C)) when p=1 and C has general moduli; B. van Geemen: Projective models of Picard modular varieties; J.Kollar Y.Miyaoka S.Mori: Rational curves on Fano varieties; R. Salvati Manni: Modular forms of the fourth degree; A. Vistoli: Equivariant Grothendieck groups and equivariant Chow groups; Trento examples; Open problems