Dublin's O'Connell Street came to a standstill just before lunchtime as crowds gathered to witness the final section of Dublin's Spire being lowered into place.
Work continued overnight to complete the structure which is made up of six sections and measures 120 metres in height
Engineers are waiting to check the structure before announcing the date of the official opening.
A temporary aviation light has been fixed to the top of the last section and will remain in place for three or four days until the light in the centre of the spire is turned on.