Meet your guide in the lobby of your hotel. The guide will have a sign with your name on it.
Depart to Sergiev Posad. 

Depending on the traffic situation, the drive will take you from 1 to 2 hrs, depending on the day of the week and time of the day.

Sergiev Posad is a small town now far from Moscow which grew in the 15th century around one of the greatest Russian Monasteries founded by St. Sergius of Radonezh and is still one of the largest active monasteries in Russia. 
The monastery was granted the status of Lavra in the 18th century, which is the highest rank of a monastery and there are only two lavras in Russia (and three in Urkaine, which was part of Russia back then when the titles had been granted).
It is the spiritual center of the Russian Orthodoxy and one of the most beautiful architectural ensembles which took centuries to develop into its present state and grandeur.