<DOCUMENT>
<TYPE>EX-16
<SEQUENCE>3
<FILENAME>e13561_16.txt
<DESCRIPTION>LETTER RE: CHANGE OF CERTIFYING ACCOUNTANT
<TEXT>
                                                                      Exhibit 16

June 13, 2002


Office of the Chief Accountant
Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D. C.  20549

Ladies and Gentlemen:

We have read the first four paragraphs included in Item 4 of the Form 8-K dated
June 13, 2002 of Omnicom Group Inc. to be filed with the Securities and Exchange
Commission and are in agreement with the statements contained therein.

Very truly yours,


/s/ ARTHUR ANDERSEN LLP


                                Page 5 of 6 Pages

</TEXT>
</DOCUMENT>
