Provided by MZ Data Products
 
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
 
 
FORM 6-K
 
REPORT OF FOREIGN ISSUER
PURSUANT TO RULE 13a-16 OR 15d-16 OF THE
SECURITIES EXCHANGE ACT OF 1934
 
THROUGH MARCH 23 , 2006

(Commission File No. 1-14477)
 
 
BRASIL TELECOM PARTICIPAÇÕES S.A.
(Exact name of registrant as specified in its charter)
 
BRAZIL TELECOM HOLDING COMPANY
(Translation of Registrant's name into English)
 

SIA Sul, Área de Serviços Públicos, Lote D, Bloco B
Brasília, D.F., 71.215-000
Federative Republic of Brazil
(Address of Regristrant's principal executive offices)


Indicate by check mark whether the registrant files or will file
annual reports under cover Form 20-F or Form 40-F.

Form 20-F ___X___ Form 40-F ______

Indicate by check mark if the registrant is submitting the Form 6-K
in paper as permitted by Regulation S-T Rule 101(b)(1)__.

Indicate by check mark if the registrant is submitting the Form 6-K
in paper as permitted by Regulation S-T Rule 101(b)(7)__.

Indicate by check mark whether the registrant by furnishing the
information contained in this Form is also thereby furnishing the
information to the Commission pursuant to Rule 12g3-2(b) under
the Securities Exchange Act of 1934.

Yes ______ No ___X___

If "Yes" is marked, indicated below the file number assigned to the
registrant in connection with Rule 12g3-2(b):

 


Investor Relations 
(+55 61) 3415-1140 
ri@brasiltelecom.com.br 
www.brasiltelecom.com.br/ir/ 
 
Media Relations 
(1 646) 284-9400 
ialmeida@hfgcg.com 

                                                                                                                           
Free Translation 
 
BRASIL TELECOM S.A. 
 BRASIL TELECOM PARTICIPAÇÕES S.A. 
Publicly Held Company 
 Publicly Held Company 
Corporate Taxpayer Registration 76.535.764/0001-43 
 Corporate Taxpayer Registration 02.570.688/0001-70 
Board of Trade 53 3 0000622 9 
 Board of Trade 53 3 0000581 8 

MATERIAL FACT

Brasil Telecom Participações S.A. and Brasil Telecom S.A., in compliance with Brazilian Securities and Exchange Commission's (CVM — Comissão de Valores Mobiliários) Instruction 358 dated January 3, 2002, inform that they have filed in their headquarters, on March 23, 2006, Zain Participações S.A.'s Shareholders' Agreement celebrated on March 9, 2005 and its First Amendment, celebrated on June 29, 2005.

Brasília, March 23, 2006

Charles Laganá Putz
Chief Financial Officer and Investor Relations Officer

 
SIGNATURE
 
 
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: March 23, 2006

 
BRASIL TELECOM PARTICIPAÇÕES S.A.
By:
/S/ Charles Laganá Putz
 
Name:   Charles Laganá Putz
Title:     Chief Financial Officer