Oldest temple in Tokyo ?

[undrentide]

Nezu Jinja might be the oldest. It was founded over 2,000 years ago by Prince Yamato Takeru, who passed through the swamps of Edo, on his way north to conquer some hostile regions. So it pre-dates Senso ji that was founded in A.D. 628, only some 1400 years ago. The main hall was built in 1706.

Yes, Nezu Jinja also has a long history and it survived the WWII.
The main building and other monuments were built in 1706, so they are not the oldest, yet they are indeed one of the very old.

List of National Treasure and Important Cultural Properties in Tokyo
http://www.morisawa.org/db_tokyobunkazai.html

[Sharingan]

Yes, Nezu Jinja also has a long history and it survived the WWII.
The main building and other monuments were built in 1706, so they are not the oldest, yet they are indeed one of the very old.

List of National Treasure and Important Cultural Properties in Tokyo
http://www.morisawa.org/db_tokyobunkazai.html

In your link, does 指定年月日 mean the last date of reconstruction ? If so, the oldest are the two pagodas built in 1911.

[undrentide]

In your link, does 指定年月日 mean the last date of reconstruction ? If so, the oldest are the two pagodas built in 1911.

No, 指定年月日 is the date when the building was appointed (?) as the national treasure/important cultural property.
建築年 is the year when the building was built.