Abstract. Excited states of the nucleus 170 Er have been studied by Coulomb excitation using the GASP γ-ray detector system at the Laboratori Nazionali di Legnaro. The ground-state band along with a low-lying K π = 0 + band and γ-vibrational band were populated during the experiment. Based on the measured γ-ray yields, a set of interband and intraband matrix elements has been extracted using the Coulomb excitation code GOSIA. The resulting E2 matrix elements are compared to collective model predictions