Polarization spectroscopy of photochem. produced spectral holes was used to obtain the line-narrowed spectrum of the first electronic transition of meso-tetraphenylporphine (TPP) in a PMMA matrix at 10 K. The spectral holes were burned through irradn. with a pulsed dye laser into the spectral region of several vibronic transitions with overlapping inhomogeneous bands. The corresponding satellite holes were detected in the spectral region of the electronic origin. More than 50 lines were obsd. up to vibrational wavenumbers of 1850 cm-1 above the electronic origin. The inhomogeneously broadened absorption spectrum displays only 2 broad bands in this spectral region. The vibrational frequencies of the first excited electronic state of TPP obtained in this way agree very well with those obtained for the same mol. with fluorescence spectroscopy in a supersonic jet, in a polystyrene matrix, and a cryst. Shpol'skii host. They are also very similar to those of the electronic ground state known from resonance Raman spectra. An anal. of the linewidths of resonant holes and satellite holes reveals a small effect of the inhomogeneous site distribution on the vibrational frequencies.