One of the most obvious and physical differences between traditional Christianity and LDS Christianity is that Mormons build and use temples. Mormons believe that temple worship was not to be discontinued after Christ, and that it was important in Old Testament times, New Testament times, now, and in the last days. Mormons believe that the early Christians saw the importance of the temple, and that that importance was lost in the apostasy, and therefore the restoration of temples is therefore from God. Specifically, Mormons cite these scriptures in support of temples for Christians:
Acts 2:46-"And they, continuing daily with one accord in the temple, and breaking bread from house to house, did eat their meat with gladness and singleness of heart, "
Acts 5:42-"And daily in the temple, and in every house, they ceased not to teach and preach Jesus Christ. "
Matt 21:12-14-“And Jesus went into the temple of God, and cast out all them that sold and bought in the temple, and overthrew the tables of the moneychangers, and the seats of them that sold doves,
13 And said unto them, It is written, My house shall be called the house of prayer; but ye have made it a den of thieves.
14 And the blind and the lame came to him in the temple; and he healed them.”
Luke 24:49-53-“And, behold, I send the promise of my Father upon you: but tarry ye in the city of Jerusalem, until ye be endued with power from on high.
50 ¶ And he led them out as far as to Bethany, and he lifted up his hands, and blessed them.
51 And it came to pass, while he blessed them, he was parted from them, and carried up into heaven.
52 And they worshipped him, and returned to Jerusalem with great joy:
53 And were continually in the temple, praising and blessing God. Amen.”
So, did early Christians use temples, and should we also have temples? Of course, current LDS temples function for purposes such as the Endowment, Sealings, and Baptism for the Dead, and it would be hard to find evidence of such practices in early Christian times. However this discussion is more about the Catholic view on the use of temples and whether they are needed, in light of the above scriptures.