Exhibit 16.1

July 7, 2005

Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549-7561

Dear Sirs/Madams:

We have read Item 4 of PMA Capital Corporation’s Form 8-K dated July 7, 2005, and have the following comments:

1.We agree with the statements made in Item 4.01, paragraph (a).

2.We have no basis on which to agree or disagree with the statements made in Item 4.01, paragraph (b).

Yours truly,

/s/ Deloitte & Touche LLP