Hallsteinn Sigurðsson
... that a display of sculptures by Hallsteinn Sigurðsson was installed in the tunnels and vaults of a hydroelectric power station in Iceland?
... that a display of sculptures by <b id="mwFUk"><a href="./Hallsteinn_Sigurðsson" id="mwFUo" rel="mw:WikiLink" title="Hallsteinn Sigurðsson">Hallsteinn Sigurðsson</a></b> was installed in the tunnels and vaults of a <a class="mw-redirect" href="./Icelandic_hydroelectric_power_stations" id="mwFUs" rel="mw:WikiLink" title="Icelandic hydroelectric power stations">hydroelectric power station in Iceland</a>?