There shall be a lien upon all real estate within said City for the City taxes assessed thereon, including such penalties added thereto for nonpayment thereof as are prescribed by this act, from the first day of April of the year in which said taxes are assessed. Said liens may be enforced by appropriate suit in any court of record in Kanawha County; provided, such suit be instituted within five years from the time the said liens attached as herein provided, and such suit may either be instituted by and in the name of the City of Dunbar as plaintiff, or said City may intervene by petition in any suit pending to sell or enforce liens against any real estate which is subject to such lien for said taxes. The liens herein created shall have the priority over all other liens, except those for taxes due this State.