  This paper review one construction of Frobenius manifolds (and slightly
weaker structures). It splits it into several steps and discusses the freedom
and the constraints in these steps. The steps pass through holomorphic bundles
with meromorphic connections. A conjecture on existence and uniqueness of
certain such bundles, a proof of the conjecture in the 2-dimensional cases, and
some other new results form a research part of this paper.
