This river city, known for the famous Gateway Arch, now has a new landmark to its credit, a dedicated temple of The Church of Jesus Christ of Latter-day Saints.

And if the Saint Louis Missouri Temple is a landmark for the city, it is a milestone for the church, being the 50th operating temple in the world for the nearly 10-million-member religion.President Gordon B. Hinckley dedicated the structure Sunday in the first of what will be 19 separate services that conclude Thursday, each regarded as equal in importance.

Other speakers at Sunday's sessions were Elders L. Tom Perry and David B. Haight of the Quorum of the Twelve; Elder W. Eugene Hansen of the Presidency of the Seventy, who is executive director of the Temple Department; and Elder Hugh W. Pinnock of the Seventy who is president of the North America Central Area.

President Hinckley was scheduled to preside over dedicatory sessions Monday. President James E. Faust, second counselor in the First Presidency, will arrive to conduct sessions Tuesday and part of Wednesday, and President Thomas S. Monson, first counselor in the First Presidency, will conduct the remaining sessions Wednesday and Thursday.