VENICE, March 27---J. Pierpont Morgan has written a cordial letter to the committee, announcing that he will be in Venice on April 23 for the inauguration of the biennial International Art Exhibition, April 25, and dedicate the new Campanile of St. Mark's.

The municipality has issued an invitation to Italy and the world to attend the ceremonies.

The invitation, which includes an engraving by Joseph Pennell, the American artist, is considered a masterpiece, representing the homage of American art to Venetian glories. It shows the piazza of St. Mark's, seen from the water, with new and original effects.