Buchanan Ingersoll and Klett Rooney Lieber & Schorling have become one, after a shareholder vote at both firms Monday morning gave the merger the go-ahead.

The new firm, Buchanan Ingersoll & Rooney, will become the largest law firm in Pennsylvania — in terms of number of attorneys in the state — with roughly 313 lawyers according to the last survey conducted by Pennsylvania Law Weekly. As a whole, the firm will have over 525 attorneys.