EXHIBIT 4.1 ———– CERTIFICATE OF LIMITED PARTNERSHIP FOR ATLAS AMERICA SERIES 26-2005 L.P. DELAWARE ————— The First State I, HARRIET SMITH WINDSOR, SECRETARY OF STATE OF THE STATE OF DELAWARE, DOHEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE CERTIFICATE OFLIMITED PARTNERSHIP OF “ATLAS AMERICA SERIES 26-2005 L.P.”, FILED IN THIS OFFICEON THE TWENTY-SIXTH DAY OF MAY, A.D. 2005, AT 11:30 O’CLOCK A.M. [GRAPHIC OMITTED]3976324 8100 /s/ Harriet Smith Windsor050439333 —————————————– Harriet Smith Windsor, Secretary of State AUTHENTICATION: 3908236 DATE: 05-26-05 State of Delaware Secretary of State Division of Corporations Delivered 11:30 AM 05/26/2005 FILED 11:30 AM 05/26/2005 SRV 050439333 – 3976324 FILEC STATE OF DELAWARE CERTIFICATE OF LIMITED PARTNERSHIPo THE UNDERSIGNED, desiring to form a limited partnership pursuant to the Delaware Revised Uniform Limited Partnership Act, 6 Delaware Code, Chapter 17, do hereby certify as follows:o FIRST: The name of the limited partnership is ATLAS AMERICA SERIES 26-2005 L.P.o SECOND: The address of its registered office in the State of Delaware is 110 S. POPLAR STREET, SUITE 101 in the City of WILMINGTON, DE 19801 The name of the Registered Agent at such address is ANDREW M. LUBINo Third: The name and mailing address of each general partner is as follows: ATLAS RESOURCES, INC. MANAGING GENERAL PARTNER 311 ROUSER ROAD, P.O. BOX 611 MOON TOWNSHIP, PA 15108o IN WITNESS WHEREOF, the undersigned has executed this Certificate of LimitedPartnership of Atlas America Series 26-2005 L.P. as of May 13, 2005. Partnership Name BY: ATLAS RESOURCES, INC. MANAGING GENERAL PARTNER /s/ Karen A. Black ——————————————– KAREN A. BLACK, VICE PRESIDENT – PARTNERSHIP ADMINISTRATION