  The following review presents an attempt to discuss various issues of current
interest in Observational Cosmology, the selection of which as well as the
emphasis given, reflects my own preference and biases. After presenting some
Cosmological basics, for which I was aided by excellent text-books, I emphasize
on attempts to determine some of the important cosmological parameters; the
Hubble constant, the curvature and total mass content of the Universe. The
outcome of these very recent studies is that the "concordance" model, that fits
the majority of observations, is that with Omega_m+ Omega_Lambda=1,
Omega_Lambda ~ 0.7, Ho ~ 70 km/sec Mpc, Omega_B ~ 0.04 and spectral index of
primordial fluctuation spectrum, the inflationary value n ~ 1. I apologise
before hand for the many important works that I may have omitted.
